Zainab bint Muhammad () (600–629 CE) was the eldest daughter of the Islamic prophet Muhammad by his first wife Khadijah.
Marriage
She married her maternal cousin, Abu al-As ibn al-Rabi', before December 610, and Khadija gave her a wedding present of an onyx necklace. Zainab became a Muslim soon after Muhammad first declared himself a prophet. The Quraysh pressured Abu al-As to divorce Zainab, saying they would give him any woman he liked in exchange, but Abu al-As said that he did not want any other woman, a stance for which Muhammad commended him. Muhammad had no jurisdiction over Mecca and therefore could not force them to separate, so they continued to live together despite Abu al-As's refusal to convert to Islam. Zainab remained in Mecca when the other Muslims following Muhammad migrated to Medina.
Emigration to Medina
Abu al-As was one of the polytheists who was captured at the Battle of Badr. Zainab sent the money for his ransom, including the onyx necklace. When Muhammad saw the necklace, he refused to accept any cash ransom for his son-in-law. He sent Abu al-As home, and Abu al-As promised to send Zainab to Medina.