Miracle recognition

A miracle should be done in a way so that experts in that era recognize that what is presented is really supernatural sign and human cannot do it. Hence, prophets did activities that the most competent experts were not able to do it.
Therefore, miracle of Islam is Quran that was expressed to Arabic People in that era with the best style and the most permanent content and language experts in that era recognized that it could not be made by human. Of course, the super style of Quran is already permanent from aspects of order and content.
Valid Bin Moghayere that was a skillful spokesman and one of heads of Arab said about Quran
'' یا عَجَباً لما یقول ابن ابی كبشه، فوالله ما هو بشعر و لا بسحر و لا بهذی جُنون و إنّ قوله لمن كلام الله''
When he was passing by the prophet, he heard that he was reading the verses of Quran;
ثُمَّ خَلَقْنَا النُّطْفَةَ عَلَقَةً فَخَلَقْنَا الْعَلَقَةَ مُضْغَةً فَخَلَقْنَا الْمُضْغَةَ عِظَامًا فَكَسَوْنَا الْعِظَامَ لَحْمًا ثُمَّ أَنشَأْنَاهُ خَلْقًا آخَرَ ۚ فَتَبَارَكَ اللَّهُ أَحْسَنُ الْخَالِقِينَ
Then We made the sperm into a clot of congealed blood; then of that clot We made a (foetus) lump; then we made out of that lump bones and clothed the bones with flesh; then we developed out of it another creature. So blessed be Allah, the best to create.
فَأَوْحَيْنَا إِلَيْهِ أَنِ اصْنَعِ الْفُلْكَ بِأَعْيُنِنَا وَوَحْيِنَا فَإِذَا جَاءَ أَمْرُنَا وَفَارَ التَّنُّورُ ۙ فَاسْلُكْ فِيهَا مِن كُلٍّ زَوْجَيْنِ اثْنَيْنِ وَأَهْلَكَ إِلَّا مَن سَبَقَ عَلَيْهِ الْقَوْلُ مِنْهُمْ ۖ وَلَا تُخَاطِبْنِي فِي الَّذِينَ ظَلَمُوا ۖ إِنَّهُم مُّغْرَقُونَ
So We inspired him (with this message): "Construct the Ark within Our sight and under Our guidance: then when comes Our Command, and the fountains of the earth gush forth, take thou on board pairs of every species, male and female, and thy family- except those of them against whom the Word has already gone forth: And address Me not in favour of the wrong-doers; for they shall be drowned (in the Flood).
وَقَالَ الْمَلَأُ مِن قَوْمِهِ الَّذِينَ كَفَرُوا وَكَذَّبُوا بِلِقَاءِ الْآخِرَةِ وَأَتْرَفْنَاهُمْ فِي الْحَيَاةِ الدُّنْيَا مَا هَٰذَا إِلَّا بَشَرٌ مِّثْلُكُمْ يَأْكُلُ مِمَّا تَأْكُلُونَ مِنْهُ وَيَشْرَبُ مِمَّا تَشْرَبُونَ
And the chiefs of his people, who disbelieved and denied the Meeting in the Hereafter, and on whom We had bestowed the good things of this life, said: "He is no more than a man like yourselves: he eats of that of which ye eat, and drinks of what ye drink.
ثُمَّ أَرْسَلْنَا رُسُلَنَا تَتْرَىٰ ۖ كُلَّ مَا جَاءَ أُمَّةً رَّسُولُهَا كَذَّبُوهُ ۚ فَأَتْبَعْنَا بَعْضَهُم بَعْضًا وَجَعَلْنَاهُمْ أَحَادِيثَ ۚ فَبُعْدًا لِّقَوْمٍ لَّا يُؤْمِنُونَ
Then sent We our messengers in succession: every time there came to a people their messenger, they accused him of falsehood: so We made them follow each other (in punishment): We made them as a tale (that is told): So away with a people that will not believe.
وَلَوِ اتَّبَعَ الْحَقُّ أَهْوَاءَهُمْ لَفَسَدَتِ السَّمَاوَاتُ وَالْأَرْضُ وَمَن فِيهِنَّ ۚ بَلْ أَتَيْنَاهُم بِذِكْرِهِمْ فَهُمْ عَن ذِكْرِهِم مُّعْرِضُونَ
If the Truth had been in accord with their desires, truly the heavens and the earth, and all beings therein would have been in confusion and corruption! Nay, We have sent them their admonition, but they turn away from their admonition.
وَمَن يَدْعُ مَعَ اللَّهِ إِلَٰهًا آخَرَ لَا بُرْهَانَ لَهُ بِهِ فَإِنَّمَا حِسَابُهُ عِندَ رَبِّهِ ۚ إِنَّهُ لَا يُفْلِحُ الْكَافِرُونَ
If anyone invokes, besides Allah, Any other god, he has no authority therefor; and his reckoning will be only with his Lord! and verily the Unbelievers will fail to win through.
Then he said
''والله لقد سمعت من محمد آنفاً كلاماً ما هو من كلام الإنس و لا من كلام الجنّ، و الله إنّ له لحلاوهً، و إنّ علیه لطلاوهً، و إنّ اعلاه لمثمر، و إنّ اسفله لمُغدق، و إنّه یعلو و ما یُعلی''
Atabe came to the prophet (peace of Allah be upon him and his descendants) and offered him the best things such as wealth, rank and … when he was talking, the prophet listened to him silently. Then the prophet said to him '' if you have finished your talks, now you listen to my remarks''. Then prophet started reciting the verses of Fussilat Surah;
حم
Ha Mim
تَنزِيلٌ مِّنَ الرَّحْمَٰنِ الرَّحِيمِ
.A Revelation from (Allah), Most Gracious, Most Merciful
كِتَابٌ فُصِّلَتْ آيَاتُهُ قُرْآنًا عَرَبِيًّا لِّقَوْمٍ يَعْلَمُونَ
A Book, whereof the verses are explained in detail;- a Qur´an in Arabic, for people who understand.
بَشِيرًا وَنَذِيرًا فَأَعْرَضَ أَكْثَرُهُمْ فَهُمْ لَا يَسْمَعُونَ
Giving good news and admonition: yet most of them turn away, and so they hear not.
وَقَالُوا قُلُوبُنَا فِي أَكِنَّةٍ مِّمَّا تَدْعُونَا إِلَيْهِ وَفِي آذَانِنَا وَقْرٌ وَمِن بَيْنِنَا وَبَيْنِكَ حِجَابٌ فَاعْمَلْ إِنَّنَا عَامِلُونَ
They say: "Our hearts are under veils, (concealed) from that to which thou dost invite us, and in our ears in a deafness, and between us and thee is a screen: so do thou (what thou wilt); for us, we shall do (what we will).
قُلْ إِنَّمَا أَنَا بَشَرٌ مِّثْلُكُمْ يُوحَىٰ إِلَيَّ أَنَّمَا إِلَٰهُكُمْ إِلَٰهٌ وَاحِدٌ فَاسْتَقِيمُوا إِلَيْهِ وَاسْتَغْفِرُوهُ ۗ وَوَيْلٌ لِّلْمُشْرِكِينَ
Say thou: "I am but a man like you: It is revealed to me by Inspiration, that your Allah is one Allah: so stand true to Him, and ask for His Forgiveness." And woe to those who join gods with Allah''.
الَّذِينَ لَا يُؤْتُونَ الزَّكَاةَ وَهُم بِالْآخِرَةِ هُمْ كَافِرُونَ
. Those who practise not regular Charity, and who even deny the Hereafter
إِنَّ الَّذِينَ آمَنُوا وَعَمِلُوا الصَّالِحَاتِ لَهُمْ أَجْرٌ غَيْرُ مَمْنُونٍ
For those who believe and work deeds of righteousness is a reward that will never fail.

قُلْ أَئِنَّكُمْ لَتَكْفُرُونَ بِالَّذِي خَلَقَ الْأَرْضَ فِي يَوْمَيْنِ وَتَجْعَلُونَ لَهُ أَندَادًا ۚ ذَٰلِكَ رَبُّ الْعَالَمِينَ
Say: Is it that ye deny Him Who created the earth in two Days? And do ye join equals with Him? He is the Lord of (all) the Worlds.
وَجَعَلَ فِيهَا رَوَاسِيَ مِن فَوْقِهَا وَبَارَكَ فِيهَا وَقَدَّرَ فِيهَا أَقْوَاتَهَا فِي أَرْبَعَةِ أَيَّامٍ سَوَاءً لِّلسَّائِلِينَ
He set on the (earth), mountains standing firm, high above it, and bestowed blessings on the earth, and measure therein all things to give them nourishment in due proportion, in four Days, in accordance with (the needs of) those who seek (Sustenance).
ثُمَّ اسْتَوَىٰ إِلَى السَّمَاءِ وَهِيَ دُخَانٌ فَقَالَ لَهَا وَلِلْأَرْضِ ائْتِيَا طَوْعًا أَوْ كَرْهًا قَالَتَا أَتَيْنَا طَائِعِينَ
Moreover He comprehended in His design the sky, and it had been (as) smoke: He said to it and to the earth: "Come ye together, willingly or unwillingly." They said: "We do come (together), in willing obedience''.
فَقَضَاهُنَّ سَبْعَ سَمَاوَاتٍ فِي يَوْمَيْنِ وَأَوْحَىٰ فِي كُلِّ سَمَاءٍ أَمْرَهَا ۚ وَزَيَّنَّا السَّمَاءَ الدُّنْيَا بِمَصَابِيحَ وَحِفْظًا ۚ ذَٰلِكَ تَقْدِيرُ الْعَزِيزِ الْعَلِيمِ
So He completed them as seven firmaments in two Days, and He assigned to each heaven its duty and command. And We adorned the lower heaven with lights, and (provided it) with guard. Such is the Decree of (Him) the Exalted in Might, Full of Knowledge.
فَإِنْ أَعْرَضُوا فَقُلْ أَنذَرْتُكُمْ صَاعِقَةً مِّثْلَ صَاعِقَةِ عَادٍ وَثَمُودَ
But if they turn away, say thou: "I have warned you of a stunning Punishment (as of thunder and lightning) like that which (overtook) the ´Ad and the Thamud.
إِذْ جَاءَتْهُمُ الرُّسُلُ مِن بَيْنِ أَيْدِيهِمْ وَمِنْ خَلْفِهِمْ أَلَّا تَعْبُدُوا إِلَّا اللَّهَ ۖ قَالُوا لَوْ شَاءَ رَبُّنَا لَأَنزَلَ مَلَائِكَةً فَإِنَّا بِمَا أُرْسِلْتُم بِهِ كَافِرُونَ
Behold, the messengers came to them, from before them and behind them, (preaching): "Serve none but Allah." They said, "If our Lord had so pleased, He would certainly have sent down angels (to preach). Now we reject your mission (altogether).
فَأَمَّا عَادٌ فَاسْتَكْبَرُوا فِي الْأَرْضِ بِغَيْرِ الْحَقِّ وَقَالُوا مَنْ أَشَدُّ مِنَّا قُوَّةً ۖ أَوَلَمْ يَرَوْا أَنَّ اللَّهَ الَّذِي خَلَقَهُمْ هُوَ أَشَدُّ مِنْهُمْ قُوَّةً ۖ وَكَانُوا بِآيَاتِنَا يَجْحَدُونَ
Now the ´Ad behaved arrogantly through the land, against (all) truth and reason, and said: "Who is superior to us in strength?" What! did they not see that Allah, Who created them, was superior to them in strength? But they continued to reject Our Signs.
فَأَرْسَلْنَا عَلَيْهِمْ رِيحًا صَرْصَرًا فِي أَيَّامٍ نَّحِسَاتٍ لِّنُذِيقَهُمْ عَذَابَ الْخِزْيِ فِي الْحَيَاةِ الدُّنْيَا ۖ وَلَعَذَابُ الْآخِرَةِ أَخْزَىٰ ۖ وَهُمْ لَا يُنصَرُونَ
So We sent against them a furious Wind through days of disaster, that We might give them a taste of a Penalty of humiliation in this life; but the Penalty of a Hereafter will be more humiliating still: and they will find no help.
وَأَمَّا ثَمُودُ فَهَدَيْنَاهُمْ فَاسْتَحَبُّوا الْعَمَىٰ عَلَى الْهُدَىٰ فَأَخَذَتْهُمْ صَاعِقَةُ الْعَذَابِ الْهُونِ بِمَا كَانُوا يَكْسِبُونَ
As to the Thamud, We gave them Guidance, but they preferred blindness (of heart) to Guidance: so the stunning Punishment of humiliation seized them, because of what they had earned.
وَنَجَّيْنَا الَّذِينَ آمَنُوا وَكَانُوا يَتَّقُونَ
. But We delivered those who believed and practised righteousness
حَتَّىٰ إِذَا مَا جَاءُوهَا شَهِدَ عَلَيْهِمْ سَمْعُهُمْ وَأَبْصَارُهُمْ وَجُلُودُهُم بِمَا كَانُوا يَعْمَلُونَ
At length, when they reach the (Fire), their hearing, their sight, and their skins will bear witness against them, as to (all) their deeds.
وَقَالُوا لِجُلُودِهِمْ لِمَ شَهِدتُّمْ عَلَيْنَا ۖ قَالُوا أَنطَقَنَا اللَّهُ الَّذِي أَنطَقَ كُلَّ شَيْءٍ وَهُوَ خَلَقَكُمْ أَوَّلَ مَرَّةٍ وَإِلَيْهِ تُرْجَعُون
They will say to their skins: "Why bear ye witness against us?" They will say: "Allah hath given us speech,- (He) Who giveth speech to everything: He created you for the first time, and unto Him were ye to return.
وَمَا كُنتُمْ تَسْتَتِرُونَ أَن يَشْهَدَ عَلَيْكُمْ سَمْعُكُمْ وَلَا أَبْصَارُكُمْ وَلَا جُلُودُكُمْ وَلَٰكِن ظَنَنتُمْ أَنَّ اللَّهَ لَا يَعْلَمُ كَثِيرًا مِّمَّا تَعْمَلُونَ
Ye did not seek to hide yourselves, lest your hearing, your sight, and your skins should bear witness against you! But ye did think that Allah knew not many of the things that ye used to do.
وَذَٰلِكُمْ ظَنُّكُمُ الَّذِي ظَنَنتُم بِرَبِّكُمْ أَرْدَاكُمْ فَأَصْبَحْتُم مِّنَ الْخَاسِرِينَ
But this thought of yours which ye did entertain concerning your Lord, hath brought you to destruction, and (now) have ye become of those utterly lost.
فَإِن يَصْبِرُوا فَالنَّارُ مَثْوًى لَّهُمْ ۖ وَإِن يَسْتَعْتِبُوا فَمَا هُم مِّنَ الْمُعْتَبِينَ
If, then, they have patience, the Fire will be a home for them! and if they beg to be received into favour, into favour will they not (then) be received.
وَقَيَّضْنَا لَهُمْ قُرَنَاءَ فَزَيَّنُوا لَهُم مَّا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ وَحَقَّ عَلَيْهِمُ الْقَوْلُ فِي أُمَمٍ قَدْ خَلَتْ مِن قَبْلِهِم مِّنَ الْجِنِّ وَالْإِنسِ ۖ إِنَّهُمْ كَانُوا خَاسِرِينَ
And We have destined for them intimate companions (of like nature), who made alluring to them what was before them and behind them; and the sentence among the previous generations of Jinns and men, who have passed away, is proved against them; for they are utterly lost.
وَقَالَ الَّذِينَ كَفَرُوا لَا تَسْمَعُوا لِهَٰذَا الْقُرْآنِ وَالْغَوْا فِيهِ لَعَلَّكُمْ تَغْلِبُونَ
The Unbelievers say: "Listen not to this Qur´an, but talk at random in the midst of its (reading), that ye may gain the upper hand.
فَلَنُذِيقَنَّ الَّذِينَ كَفَرُوا عَذَابًا شَدِيدًا وَلَنَجْزِيَنَّهُمْ أَسْوَأَ الَّذِي كَانُوا يَعْمَلُونَ
But We will certainly give the Unbelievers a taste of a severe Penalty, and We will requite them for the worst of their deeds.
ذَٰلِكَ جَزَاءُ أَعْدَاءِ اللَّهِ النَّارُ ۖ لَهُمْ فِيهَا دَارُ الْخُلْدِ ۖ جَزَاءً بِمَا كَانُوا بِآيَاتِنَا يَجْحَدُونَ
Such is the requital of the enemies of Allah,- the Fire: therein will be for them the Eternal Home: a (fit) requital, for that they were wont to reject Our Signs.
وَقَالَ الَّذِينَ كَفَرُوا رَبَّنَا أَرِنَا اللَّذَيْنِ أَضَلَّانَا مِنَ الْجِنِّ وَالْإِنسِ نَجْعَلْهُمَا تَحْتَ أَقْدَامِنَا لِيَكُونَا مِنَ الْأَسْفَلِينَ
And the Unbelievers will say: "Our Lord! Show us those, among Jinns and men, who misled us: We shall crush them beneath our feet, so that they become the vilest (before all).
إِنَّ الَّذِينَ قَالُوا رَبُّنَا اللَّهُ ثُمَّ اسْتَقَامُوا تَتَنَزَّلُ عَلَيْهِمُ الْمَلَائِكَةُ أَلَّا تَخَافُوا وَلَا تَحْزَنُوا وَأَبْشِرُوا بِالْجَنَّةِ الَّتِي كُنتُمْ تُوعَدُونَ
In the case of those who say, "Our Lord is Allah", and, further, stand straight and steadfast, the angels descend on them (from time to time): "Fear ye not!" (they suggest), "Nor grieve! but receive the Glad Tidings of the Garden (of Bliss), the which ye were promised.
There are a lot of narrations from heads and spokesmen of Arab about Quran that the history has recorded them.