Hadhrat Abdur Rahmaan R.A replied, "May Allaah bless you in your family and wealth". Just show me the way to the marketplace. "When Hadhrat Sa'd R.A showed Hadhrat Abdur Rahmaan R.A where the marketplace was, Hadhrat Abdur Rahmaan R.A started buying and selling until he had made a profit. He returned with some cheese and butter.
He continued like this for a while until one day he appeared with the colour of saffron on his clothes. "What is this all about?" asked Rasulullaah PBUH. "I have married," he replied. "What dowry did you give your wife?" Rasulullaah PBUH asked further. Hadhrat Abdur Rahmaan R.A replied, "The weight of a date stone in gold." Rasulullaah PBUH then advised, "Host a Waleema even if you have to feed a goat." (Referring to the tremendous blessings that Allaah had granted him in business,) Hadhrat Abdur Rahmaan R.A used to say, "Even if I were to pick up a stone, I could hope to receive gold or silver in exchange(1)."
FataulBaari (Vo1.7 Pg.191).
The Lives of the Companions