Yahya ibn Ayyub, Qutaybah, and Ibn Hujr narrated to us, all from Isma'il ibn Ja'far — Ibn Ayyub said: Isma'il narrated to us — he informed me: Al-'Ala', from his father, from Abu Hurayrah, that the Messenger of Allah, peace and blessings be upon him, said: "A Muslim shall not outbid his brother in a sale, nor shall he propose marriage over his brother's proposal."