Al-'Ankabut 29:51

وَمَا كُنتَ تَتْلُو مِن قَبْلِهِ مِن كِتَابٍ وَلَا تَخُطُّهُ بِيَمِينِكَ ۖ إِذًا لَّارْتَابَ الْمُبْطِلُونَ

And you did not recite before it any scripture, nor did you inscribe one with your right hand. Otherwise the falsifiers would have had [cause for] doubt.

بَلْ هُوَ آيَاتٌ بَيِّنَاتٌ فِي صُدُورِ الَّذِينَ أُوتُوا الْعِلْمَ ۚ وَمَا يَجْحَدُ بِآيَاتِنَا إِلَّا الظَّالِمُونَ

Rather, the Qur'an is distinct verses [preserved] within the breasts of those who have been given knowledge. And none reject Our verses except the wrongdoers.

وَقَالُوا لَوْلَا أُنزِلَ عَلَيْهِ آيَاتٌ مِّن رَّبِّهِ ۖ قُلْ إِنَّمَا الْآيَاتُ عِندَ اللَّهِ وَإِنَّمَا أَنَا نَذِيرٌ مُّبِينٌ

But they say, "Why are not signs sent down to him from his Lord?" Say, "The signs are only with Allah, and I am only a clear warner."

قُلْ كَفَىٰ بِاللَّهِ بَيْنِي وَبَيْنَكُمْ شَهِيدًا ۖ يَعْلَمُ مَا فِي السَّمَاوَاتِ وَالْأَرْضِ ۗ وَالَّذِينَ آمَنُوا بِالْبَاطِلِ وَكَفَرُوا بِاللَّهِ أُولَـٰئِكَ هُمُ الْخَاسِرُونَ

Say, "Sufficient is Allah between me and you as Witness. He knows what is in the heavens and earth. And they who have believed in falsehood and disbelieved in Allah - it is those who are the losers."

وَيَسْتَعْجِلُونَكَ بِالْعَذَابِ ۚ وَلَوْلَا أَجَلٌ مُّسَمًّى لَّجَاءَهُمُ الْعَذَابُ وَلَيَأْتِيَنَّهُم بَغْتَةً وَهُمْ لَا يَشْعُرُونَ

And they urge you to hasten the punishment. And if not for [the decree of] a specified term, punishment would have reached them. But it will surely come to them suddenly while they perceive not.

يَسْتَعْجِلُونَكَ بِالْعَذَابِ وَإِنَّ جَهَنَّمَ لَمُحِيطَةٌ بِالْكَافِرِينَ

They urge you to hasten the punishment. And indeed, Hell will be encompassing of the disbelievers