أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ ۚ وَلَوْ كَانَ مِنْ عِندِ غَيْرِ ٱللَّهِ لَوَجَدُوا۟ فِيهِ ٱخْتِلَـٰفًا كَثِيرًا

Then do they not reflect upon the Qur’ān?1 If it had been from [any] other than Allāh, they would have found within it much contradiction.

An-Nisa 82

لَقَدْ كَانَ فِى قَصَصِهِمْ عِبْرَةٌ لِّأُو۟لِى ٱلْأَلْبَـٰبِ ۗ مَا كَانَ حَدِيثًا يُفْتَرَىٰ وَلَـٰكِن تَصْدِيقَ ٱلَّذِى بَيْنَ يَدَيْهِ وَتَفْصِيلَ كُلِّ شَىْءٍ وَهُدًى وَرَحْمَةً لِّقَوْمٍ يُؤْمِنُونَ

There was certainly in their stories a lesson for those of understanding. Never was it [i.e., the Qur’ān] a narration invented, but a confirmation of what was before it and a detailed explanation of all things and guidance and mercy for a people who believe.

Yusuf 111

وَلَتَعْلَمُنَّ نَبَأَهُۥ بَعْدَ حِينٍۭ

And you will surely know [the truth of] its information after a time."

Sad 88

هَلْ فِى ذَٰلِكَ قَسَمٌ لِّذِى حِجْرٍ

Is there [not] in [all] that an oath [sufficient] for one of perception?1

Al-Fajr 5