Sulaiman bin Da'ud bin Da'ud سليمان بن داود بن داود بن علي · The Book of Marriage

"Abu Talhah married Umm Sulaim and the dowry between them was Islam. Umm Sulaim became Muslim before Abu Talhah, and he proposed to her but she said: 'I have become Muslim; if you become Muslim I will marry you.' So he became Muslim, and that was the dowry between them."