It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The Children of Israel split into seventy-two sects, and this Ummah will split just as the Children of Israel split, but with one sect more. All of them will be in Hell except al-Sawad al-A'zam (the greatest body)." We said: O Abu Umamah, is there not enough room in al-Sawad al-A'zam? He said: "By Allah, we disapprove of what you do."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 8022