Narrated Anas bin Malik: `Abdur-Rahman bin `Auf came (from Mecca to Medina) and the Prophet made a bond of brotherhood between him and Sa`d bin Ar-Rabi Al-Ansari. Al-Ansari had two wives, so he suggested that `Abdur- Rahman take half, his wives and property. `Abdur-Rahman replied, "May Allah bless you with your wives and property. Kindly show me the market." So `Abdur-Rahman went to the market and gained (in bargains) some dried yoghurt and some butter. After a few days the Prophet saw `Abdur-Rahman with some yellow stains on his clothes and asked him, "What is that, O `Abdur-Rahman?" He replied, "I had married an Ansari woman." The Prophet asked, "How much Mahr did you give her?" He replied, "The weight of one (date) stone of gold." The Prophet said, "Offer a banquet, even with one sheep."