Narrated Anas: When `Abdur-Rahman bin `Auf came to Medina, the Prophet established a bond of brotherhood between him and Sa`d bin Ar-Rabi al-Ansari. Sa`d was a rich man, so he said to `Abdur-Rahman, I will give you half of my property and will help you marry. `Abdur-Rahman said (to him), May Allah bless you in your family and property. Show me the market. So `Abdur-Rahman did not return from the market) till he gained some dried buttermilk (yogurt) and butter (through trading). He brought that to his house-hold. We stayed for sometime (or as long as Allah wished), and then `Abdur-Rahman came, scented with yellowish perfume. The Prophet said (to him) What is this? He replied, I got married to an Ansari woman. The Prophet asked, What did you pay her? He replied, A gold stone or gold equal to the weight of a date stone. The Prophet said (to him), Give a wedding banquet even if with one sheep.