Musnad Abu Ya'la al-Mawsili 6:30

Zuhayr narrated to us, Hashim ibn al-Qasim narrated to us, Shu'bah narrated to us, Sa'd ibn Ibrahim narrated to me, from Ibrahim ibn Sa'd ibn Malik, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said to Ali: "Are you not pleased that you should be to me in the position of Aaron to Moses?"