Musnad Ahmad 1725

Buraid bin Abi Maryam narrated that Abul-Hawra" said: We were with Hasan bin "Ali and he was asked: What do you remember from the Messenger of Allah (ﷺ)? He said: I was walking with him and he passed by a store room for the zakah dates. I took a date and put it in my mouth, and he took it out with my saliva on it. One of the people said: What is wrong if you left it? He said: “Charity is not permissible for us, the family of Muhammad." And I learned from him the five prayers.