‘A’isha told that when the people of Mecca sent about ransoming their prisoners1 Zainab sent some property to ransom Abul ‘As, sending among it a necklace of hers which Khadija had had and had sent with her when she married Abul ‘As. When God’s Messenger saw it he felt great tenderness about it and said, “If you consider that you should free her prisoner for her and return to her what belongs to her it will be well.” To this they agreed. The Prophet (ﷺ) had made an agreement with him that he should let Zainab come to him, so he sent Zaid b. Haritha and a man of the Helpers, telling them to wait in the valley of Yajij2 till Zainab came along and bring her back with them. 1. After the battle of Badr. 2. Near at-Tan'im. Ahmad and Abu Dawud transmitted it.
