The Messenger of Allah ﷺ was cupped and paid the cupper his wages. Had it been unlawful earnings, the Messenger of Allah ﷺ would not have paid him.
حدثنا عبد الرزاق أخبرنا هشام عن محمد
احتجم رسول الله ﷺ وأعطى الحجام أجره ولو كان سحتا لم يعطه رسول الله ﷺ