Maliks Muwatta Book 22, Hadith Number 17.

Section : Oaths in General.

Yahya related to me from Malik from Ayyub ibn Musa from Mansur ibn Abd ar-Rahman al-Hajabi from his mother that A’isha, umm al-muminin, may Allah be pleased with her, was asked about a man who devoted his property to the door of Kaba. She said, “Let him do kaffara for it with the kaffara of the oath.”

Malik said, that someone who devoted all his property in the way of Allah, and then broke his oath, should put a third of his property in the way of Allah, as that was what the Messenger of Allah, may Allah bless him and grant him peace, did in the case of Abu Lubaba.