Hazrat Abu Bakr was elected as the first caliph after the death of the Prophet Muhammad. During Abu Bakr's caliphate, several false prophets arose claiming to receive revelation, including Tulaiha, Aswad Ansi, Musailamah, and Sajjah. Musailamah was a particularly dangerous false prophet from a central Arabian tribe who was killed in battle in 633 AD after gathering forces and marrying the female false prophet Sajjah.