Quran 4:82 from Surah An-Nisaa on Divine Marvels.
أَفَلَا يَتَدَبَّرُونَ ٱلۡقُرۡءَانَۚ وَلَوۡ كَانَ مِنۡ عِندِ غَيۡرِ ٱللَّهِ لَوَجَدُواْ فِيهِ ٱخۡتِلَٰفٗا كَثِيرٗا
English translation: Then (do) not they ponder (on) the Quran And if it had (been) (of) from other than Allah surely they (would have) found in it contradiction much
Transliteration: afala yatadabbaruna al-qur'ana walaw kana min indi ghayri al-lahi lawajadu fihi ikh'tilafan kathiran