Zayd ibn Haritha al-Kalbi

Zayd ibn Haritha al-Kalbi, born in the year five hundred eighty-one, was a prominent figure in early Islamic history. As a Sahabi and the adopted son of the Prophet Muhammad, he holds a significant place in the narrative of Islam's formative years. Zayd is often recognized as the fourth individual to embrace Islam, following the footsteps of Muhammad's wife Khadija, his cousin Ali, and his close companion Abu Bakr.

Originally a slave, Zayd was purchased by Hakim ibn Hizam, Khadija's nephew, at a market in Ukaz. He was later adopted by Muhammad and Khadija, taking on their lineage. This connection was pivotal, especially when his lineage was restored prior to his marriage to Zaynab bint Jahsh, which ultimately led to her divorce from him and her subsequent marriage to Muhammad.

In addition to his familial ties, Zayd was a skilled military leader, commanding early Muslim forces during Muhammad's lifetime. He played a crucial role in several military expeditions, showcasing his leadership and bravery. His final campaign took place in September of six hundred twenty-nine, when he led an expedition against the Byzantine city of Bosra. Unfortunately, this mission ended tragically at the Battle of Mu'tah, where Zayd was killed in action.