Then do they not reflect upon the Qur'an? If it had been from [any] other than Allah, they would have found within it much contradiction.
The Saheeh International Quran Translation
أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ وَلَوْ كَانَ مِنْ عِندِ غَيْرِ ٱللَّهِ لَوَجَدُوا۟ فِيهِ ٱخْتِلَٰفًا كَثِيرًاThen do they not reflect upon the Qur'an? If it had been from [any] other than Allah, they would have found within it much contradiction.