Maliks Muwatta Book 22, Hadith Number 12.

Section : Behaviour in the Kaffara of the Broken Oath.

Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, “If someone breaks an oath which he has stressed, he has to free a slave, or clothe ten poor people. If someone breaks an oath, but has not stressed it, he only has to feed ten poor people and each poor person is fed a mudd of wheat. Some one who does not have the means for that, should fast for three days.”