Silsilat al-Ahadith al-Sahihah

Sayyiduna Muawiyah bin Abu Sufyan (may Allah be pleased with them both) stood among us and said: Beware! The Messenger of Allah (peace and blessings of Allah be upon him) stood among us and said: "Those before you from the People of the Book split into seventy-two sects, and this religion will split into seventy-three sects. Of them, seventy-two will be in Hell and one, which is the Jama'ah, will go to Paradise."