ذٰلِكَ بِأَنَّ اللَّهَ نَزَّلَ الكِتابَ بِالحَقِّ ۗ وَإِنَّ الَّذينَ اختَلَفوا فِي الكِتابِ لَفي شِقاقٍ بَعيدٍ

This is because God revealed the Scripture in truth. Those who dispute the Scripture are in extreme dissent.