﴿ أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ ۚ وَلَوْ كَانَ مِنْ عِندِ غَيْرِ ٱللَّهِ لَوَجَدُوا۟ فِيهِ ٱخْتِلَٰفًۭا كَثِيرًۭا ﴾

“Will they not, then, try to understand this Qur’an? Had it issued from any but God, they would surely have found in it many an inner contradiction!”

Please check ayah 4:83 for complete tafsir.