(11) باب حِلِّ أُجْرَةِ الْحِجَامَةِ
Ibn 'Abbas (Allah be pleased with them) reported:
The slave of Banu Bayada cupped Allah's Apostle (ﷺ) and he gave him his wages, and talked to his master and he reduced the charges, and if this earning was unlawful Allah's Apostle (ﷺ) would not have given it.
Reference: Sahih Muslim 1202 c
In-book reference: Book 22, Hadith 81
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3834