Abdullah bin Abbas reported,

The Messenger of Allah ﷺ was cupped and paid the cupper his wages. Had it been unlawful, he would not have paid him. He used to be cupped on the two veins at the sides of the neck and between the shoulders. The one who cupped him was a slave belonging to Banu Bayadah, from whom a daily payment of one and a half mudd was being taken. The Prophet ﷺ interceded for him with his masters, and they reduced it to one mudd.

Ahmad 2979

Sahih

حدثنا هاشم حدثنا إسرائيل عن جابر عن عامر

عن ابن عباس قال

احتجم رسول الله ﷺ وأعطى الحجام أجره ولو كان حراما لم يعطه وكان يحتجم في الأخدعين وبين الكتفين وكان يحجمه عبد لبني بياضة وكان يؤخذ منه كل يوم مد ونصف فشفع له النبي ﷺ إلى أهله فجعل مدا

أحمد 2979صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Abdullah bin Abbas bin Abdul-Muttalib
Numbering
Darussalam 2979
Ahmad 2979