Musnad Abu Ya'la al-Mawsili 3:163

'Abd al-Rahman ibn Salam narrated to us, Ibrahim ibn Tahman narrated to us, from Abu Ishaq al-Hamdani, from Najiyah ibn Ka'b, from 'Ali ibn Abi Talib, who said: When Abu Talib died, I came to the Messenger of Allah (may Allah bless him and grant him peace) and said: "Your elderly, misguided uncle has died." He said: "Go and bury him, and do not do anything until you come to me." So I did what he commanded me to do, then I came to him. He said to me: "Perform ghusl (ritual bath), and teach me some supplications that are more beloved to me than red camels."