Yahya ibn Ayyub, Qutaybah ibn Sa'id, and Ibn Hujr narrated to us; they said: Isma'il — namely, Ibn Ja'far — narrated to us, from al-'Ala', from his father, from Abu Hurayrah, that the Messenger of Allah, peace and blessings be upon him, said: "A Muslim shall not bid against the bidding of his brother."