مسند أحمد

It was narrated that Abu Jameelah at-Tuhawi said: I heard `Ali (رضي الله عنه) say: The Messenger of Allah (ﷺ) was treated with cupping, then he said to the cupper when he was finished: How much do you pay to your masters? He said: Two sa`s. He ordered that one sa’ be waived, and he told me to give him one sa’.