Abdul-Rahman bin Awf arrived in Medina, and the Prophet ﷺ established a bond of brotherhood between him and Saad bin Rabi al-Ansari. Saad was a man of wealth, so he said to Abdul-Rahman, "I will divide my wealth with you in half, and I will help you marry."Abdul-Rahman replied, "May Allah bless you in your family and your wealth. Just show me the way to the market."He did not return until he had earned a surplus of dried curd and clarified butter… and the hadith continues.
قدم عبد الرحمن بن عوف المدينة فآخي النبي ﷺ، بينه وبين سعد بن الربيع الأنصاري، وكان سعد ذا غنى، فقال لعبد الرحمن: أقاسمك مالي نصفين وأزوجك، قال: بارك الله لك في أهلك ومالك، دلوني على السوق، فما رجع حتى استفضل أقطا وسمنا… الحديث.
Bukhari narrated it in the Book of Business Transactions (2049), from Ahmad bin Yunus, who said, Zuhayr narrated to us, who said, Humayd narrated to us, from Anas, and he related it. Part of the story is also found in Muslim, in the Book of Marriage (1427), but it does not contain the portion mentioned.