Anas said the Prophet saw the trace of yellow on ‘Abd ar-Rahman b. ‘Auf and asked what that was. He replied, “I have married a woman for a nawat* weight of gold.” He said, “God bless you! Hold a wedding- feast, even if only with a sheep.”
*a weight of five dirhams.
Anas said that Abu Talha married Umm Sulaim, the dower between them being acceptance of Islam. Umm Sulaim had become a Muslim before Abu Talha, and when he asked her in marriage she said, "I have become a Muslim, so if you become one I shall marry you.” He then accepted Islam and that was the dower arranged between them.
Umm Habiba said she was married to ‘Abdallah b. Jahsh who died in Abyssinia, so the Negus married her to the Prophet, giving her on his behalf a dower of four thousand. (A version has four thousand dirhams.) He sent her to God’s Messenger with Shurahbil b. Hasana.