Musannaf Ibn Abi Shayba 27:64

'Abd al-Rahim ibn Sulayman narrated to us, from Dawud ibn Abi Hind, who said: 'Abd Allah ibn Qays narrated to me, saying: I was with Ibn Abi Burdah one night, and al-Harith ibn Uqaysh entered upon us. Al-Harith narrated that the Messenger of Allah (may Allah bless him and grant him peace) said: "Indeed, among my Ummah is he who will enter Paradise through his intercession [a number of people] more than [the tribe of] Mudar."