It was narrated that:Sahl bin Sa'd said: “A woman came to the Prophet and he said: 'Who will marry her ?' A man said: 'I will.' The Prophet said: 'Give her something, even if it is an iron ring.' He said: 'I do not have one.' He said: 'I marry her to you for what you know of the Quran.'”

English translation · Sunan Ibn Majah