Musnad Ahmad #544

It was narrated that ‘Abdullah bin Zurair said: I entered upon `Ali bin Abi Talib (رضي الله عنه) - Hasan said: On the day of (Eid) al-Adha - and he brought some khazeerah (a dish made from small pieces of meat, broth and flour) to us. I said: May Allah guide you! Why don`t you make a dish for us from these ducks, for Allah, may He be glorified and exalted, has blessed us with a great deal of bounty. He said: O son of Zurair, I heard the Messenger of Allah (ﷺ) say: “It is not permissible for the caliph to take more from the wealth of Allah than two dishes: one from which he and his family eat and one that he offers to the People.”