Sahih al-Bukhari 3780

Ismaʿil ibn ʿAbdullah narrated to us. He said: Ibrahim ibn Saʿd narrated to me, from his father, from his grandfather, who said: When they arrived in Medina, the Messenger of Allah made ʿAbd al-Rahman and Saʿd ibn al-Rabiʿ brothers. Saʿd said to ʿAbd al-Rahman, “I am the wealthiest of the Helpers. I will divide my wealth in half. I have two wives, so look at whichever one you prefer and tell me; I will divorce her, and when her waiting period is over, you may marry her.” ʿAbd al-Rahman said, “May Allah bless your family and your wealth. Where is your market?” They showed him the market of Banu Qaynuqaʿ. He returned with some leftover dried yogurt and ghee, and continued going to the market each morning. Then one day he came with a trace of saffron on him. The Prophet said, “What is this?” He said, “I have married.” He asked, “How much did you give her as a bridal gift?” He said, “A date-stone’s weight of gold”—or “the weight of a date-stone in gold”; Ibrahim was uncertain.