It is narrated from Sayyiduna Sahl bin Sa’d (may Allah be pleased with him) that a woman came to the service of the Messenger of Allah (peace and blessings be upon him) and said:“O Messenger of Allah! I have gifted myself to you.”The Prophet (peace and blessings be upon him) looked up at her, then lowered his gaze and bowed his head. A companion said:“O Messenger of Allah! If you have no need of this woman, then marry her to me.”The Messenger of Allah (peace and blessings be upon him) said:“Do you have anything (to give as a dowry)?”He said:“No.”The Prophet said:“Go and see if you can find anything.”He went and came back saying:“I found nothing.”The Prophet said:“Go, even if it is an iron ring.”He returned and said:“Not even that.”So the Messenger of Allah (peace and blessings be upon him) said:“What do you know from the Qur’an?”He mentioned a few surahs. The Prophet said:“I have married her to you in exchange for what you know of the Qur’an.”