Sahih Bukhari Volume 007, Book 062, Hadith Number 066.
Narrated By Sahl bin Sad : A woman came to Allah's Apostle and said, "I present myself (to you) (for marriage). She stayed for a long while, then a man said, "If you are not in need of her then marry her to me." The Prophet said, "Have you got anything m order to pay her Mahr?" He said, "I have nothing with me except my Izar (waist sheet)." The Prophet said, "If you give her your Izar, you will have no Izar to wear, (so go) and search for something. He said, "I could not find anything." The Prophet said, "Try (to find something), even if it were an iron ring But he was not able to find (even that) The Prophet said (to him). "Do you memorize something of the Qur'an?" "Yes. ' he said, "such Sura and such Sura," naming those Suras The Prophet said, "We have married her to you for what you know of the Quran (by heart)."