Zayd ibn Haritha al-Kalbi

Zayd ibn Ḥāritha al-Kalbī, was an early Muslim, Sahabi 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 that Hakim ibn Hizam, Khadija's nephew, bought for her at a market in Ukaz. Zayd then became her and Muhammad’s adopted son. This father-son status was later annulled after Muhammad married Zayd’s ex-wife, Zaynab bint Jahsh. Zayd was a commander in the early Muslim army and led several early military expeditions during the lifetime of Muhammad. Zayd led his final expedition in September 629 CE, and set out to raid the Byzantine city of Bosra. However the Muslim army was intercepted by Byzantine forces and Zayd was subsequently killed at the Battle of Mu'tah. Childhood Zayd is said to have been ten years younger than Muhammad, suggesting a birth-year of 581 He is also said to have been 55 (lunar) years old at his death in 629, indicating a birthdate of 576. He was born into the Udhra branch of the Kalb tribe in the Najd region, central Arabia. He claimed a pedigree twelfth in descent from Udhra ibn Zayd al-Lat ibn Rufayda ibn Thawr ibn Kalb ibn Wabara. Zayd's mother, Suda bint Thaalaba, was from the Maan branch of the Tayy tribe.