بُلُوغُ الْمَرَامِ
Bulugh al-Maram 909
Business Transactions
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] .
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].
Sunnah.com reference: Book 7, Hadith 161