Musnad Ahmad 493:1

Yahya ibn Adam and Ibn Abi Bukayr narrated to us, they said: Isra'il narrated to us, from Abu Ishaq, from Habashi ibn Junadah—Yahya ibn Adam said: "Al-Saluli, and he had witnessed the day of the Farewell Pilgrimage"—he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Ali is from me and I am from him, and no one shall discharge [my obligations] on my behalf except me or Ali." Ibn Abi Bukayr said: "No one shall settle my debt on my behalf except me or Ali."