Muhammad ibn Rafi' narrated to us, 'Abd al-Razzaq narrated to us, Ma'mar narrated to us, from Hammam ibn Munabbih, who said: This is what Abu Hurayrah narrated to us, from the Messenger of Allah, may Allah bless him and grant him peace — and he mentioned hadiths, among them: The Messenger of Allah, may Allah bless him and grant him peace, said: "By Allah, for one of you to persist in his oath regarding his family is more sinful before Allah than to give the expiation that Allah has prescribed."