From Sahih Bukhari (Hadith 3937):
Narrated Anas:When `Abdur-Rahman bin `Auf came to Medina and the Prophet (ﷺ) established the bond of brotherhood between him and Sa`d bin Ar-Rabi-al-Ansari, Sa`d suggested that `Abdur-Rahman should accept half of his property and family. `Abdur Rahman said, "May Allah bless you in your family and property; guide me to the market." So `Abdur-Rahman (while doing business in the market) made some profit of some condensed dry yoghurt and butter. After a few days the Prophet (ﷺ) saw him wearing clothes stained with yellow perfume. The Prophet (ﷺ) asked, "What is this, O `Abdur-Rahman?" He said, "O Allah's Messenger (ﷺ)! I have married an Ansar' woman." The Prophet (ﷺ) asked, "What have you given her as Mahr?" He (i.e. `Abdur-Rahman) said, "A piece of gold, about the weight of a date stone." Then the Prophet said, Give a banquet, even though of a sheep
Reference: Bukhari 3937