Al-Baqarah 2:176

Thalika bi-anna Allahanazzala alkitaba bilhaqqi wa-inna allatheenaikhtalafoo fee alkitabi lafee shiqaqin baAAeed

That is [deserved by them] because Allāh has sent down the Book in truth. And indeed, those who differ over the Book are in extreme dissension.

All that is because Allah revealed the Book with the truth. Yet, those who have opted for dissension about the Book are in extreme division (among themselves)