An-Nisa 4:82

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

Afalā yatadabbarūna l-qur'āna walaw kāna min ʿindi ghayri l-lahi lawajadū fīhi ikh'tilāfan kathīran

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