سنن ابن ماجه

It was narrated that: Sahl bin Sa'd said: “A woman came to the Prophet (ﷺ) and he said: 'Who will marry her ?' A man said: 'I will.' The Prophet (ﷺ) 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.'”