Musnad Ahmad 921:4

Abdullah narrated to us, Muhammad ibn Abbad al-Makki narrated to us, Abu Damra narrated to us, from Yunus, from al-Zuhri, from Anas, who said: My father used to narrate that the Prophet, peace and blessings of Allah be upon him, said: "The roof of my house was opened while I was in Makkah, and Jibril descended. He opened my chest, then washed it with the water of Zamzam. Then he brought a basin of gold filled with wisdom and faith, and he poured it into my chest, then he closed it."