From Sahih Muslim (Hadith 3490):
Anas b. Malik reported that Allah's Apostle (ﷺ) saw the trace of yellowness on 'Abd al-Rahman b. 'Auf and said:What is this? Thereupon he said: Allah's Messenger, I have married a woman for a date-stone's weight of gold. He said: God bless you! Hold a wedding feast, even if only with a sheep
Reference: Muslim 3490