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
Will they not think about this Quran? If it had been from anyone other than God, they would have found much inconsistency in it.
Do they not then consider the Qur’ân carefully? Had it been from other than Allâh, they would surely have found therein many a contradiction.