Anas bin Malik was asked about the earnings of a cupper. He replied, "The Messenger of Allah ﷺ was treated with cupping by Abu Taybah, and he ordered that two saa of food be given to him. He also spoke to Abu Taybah's masters, who reduced the tax they imposed on him. He said, 'The best treatment you can use is cupping,' or, 'It is among the most excellent of your remedies.'"
سئل أنس بن مالك عن كسب الحجام؟ فقال: احتجم رسول الله ﷺ، حجمه أبو طيبة، فأمر له بصاعين من طعام، وكلم أهله فوضعوا عنه من خراجه وقال: إن أفضل ما تداويتم به الحجامة، أو هو من أمثل دوائكم.
Bukhari narrated it in the Book of Medicine (5696), and Muslim in the Book of Sharecropping and Agriculture (1577), both of them through the route of Humayd, and he mentioned it. The wording given here is Muslim's.