Musnad Ahmad 561:2

Muhammad ibn Abi ‘Adi narrated to us, from Dawud, from ‘Abdullah ibn Qays, from al-Harith ibn Uqaysh, who said: We were with Abu Barzah one night, and he narrated that night from the Prophet, may Allah bless him and grant him peace, that he said: "There are no two Muslims for whom four of their descendants die, except that Allah will cause them both to enter Paradise by the grace of His mercy." They said: "O Messenger of Allah, and three?" He said: "And three." They said: "And two?" He said: "And two." He said: "And indeed, there is among my nation one who will be made so large for the Fire that he will be one of its corners." He said: "And indeed, there is among my nation one who will enter Paradise through his intercession [a number of people] equal to [the tribe of] Mudar."