Sahih Bukhari
Wedlock, Marriage (Nikaah)
Volume: 007 / Book Number: 062 / Hadith Number: 85
Narrated Anas:
The Prophet saw the traces of Sufra (yellow perfume) on Abdur-Rahman bin 'Auf and said, "What is this?" 'Abdur-Rahman, said, "I have married a woman and have paid gold equal to the weight of a datestone (as her Mahr). The Prophet said to him, "May Allah bless you: Offer a wedding banquet even with one sheep."