1. Allaah says: "And hold fast, all of you together, to the Rope of Allaah (i.e., this Qur'an), and be not divided among yourselves." Surah Aali-`Imraan [3:103]
2. And He says: "And do not be among the polytheists. Of those who split up their religion and became sects, each sect rejoicing in...