Musnad Ahmad 932:5

Abu Amir narrated to us, Zuhayr—meaning Ibn Muhammad—narrated to us, from Abdullah ibn Muhammad, from al-Tufayl ibn Ubayy ibn Ka'b, from his father, from the Prophet (peace and blessings of Allah be upon him), who said: "When the Day of Resurrection comes, I will be the Imam of the Prophets, their orator, and the possessor of their intercession, without boastfulness."