A total of eleven women are confirmed as having been married to Muhammad, the founder of Islam. As a sign of respect, Muslims refer to each of these wives with the title Umm al-Muʼminin ( lit. 'Mother of the Believers'), which is derived from 33:6 of the Quran. Muhammad's first marriage was to Khadija bint Khuwaylid in 595, when he was 25 and she was either 28 or 41. She was his only wife until he... Wikipedia