Narrated Ibn 'Abbas (RA):

Allah's Messenger (ﷺ) had himself cupped and gave the one who cupped him his pay; and if it were prohibited he would not have given him (his pay). [Reported by al-Bukhari].

وَعَنْ اِبْنِ عَبَّاسٍ ‏-رَضِيَ اَللَّهُ عَنْهُمَا‏-; أَنَّهُ قَالَ: { اِحْتَجَمَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-وَأَعْطَى اَلَّذِي حَجَمَهُ أَجْرَهُ } وَلَوْ كَانَ حَرَاماً لَمْ يُعْطِهِ.‏ رَوَاهُ اَلْبُخَارِيُّ [1]‏ .‏