#2123 Muhammad ibn al-'Ala' narrated to us, Ishaq ibn Mansur al-Saluli narrated to us, on the authority of Ja'far al-Ahmar, on the authority of al-Sari ibn Isma'il, on the authority of Qays ibn Abi Hazim, who said: I came to the Prophet (pbuh) to pledge allegiance to him, but I arrived after he had passed away, and Abu Bakr was standing in his place. He prolonged the praise and wept much, then he said: I heard the Messenger of Allah (pbuh) saying: "It is disbelief in Allah to disown a lineage even if it is obscure, and to claim a lineage that is not known."