Zayd ibn Haritha al-Kalbi

Zayd ibn Kalb, was an early Muslim, sahabah and the adopted son of the Islamic prophet, Muhammad. He is commonly regarded as the fourth person to have accepted Islam, after Muhammad's wife Khadija, Muhammad's cousin Ali, and Muhammad's close companion Abu Bakr, Zayd was a slave in Khadija's household for several years, but Muhammad later freed and legally adopted Zayd as his own son. Zayd was afterwards married to two prominent women of Muhammad's household, including his cousin Zaynab and his mother's servant Umm Ayman.