Sahih al-Bukhari, Volume 3, Book 36, Hadith 479 (USC-MSA) ⓘ
Narrated Ibn `Abbas: When the Prophet was cupped, he paid the man who cupped him his wages. If it had been undesirable he would not have paid him.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، عَنْ خَالِدٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ احْتَجَمَ النَّبِيُّ صلى الله عليه وسلم وَأَعْطَى الْحَجَّامَ أَجْرَهُ، وَلَوْ عَلِمَ كَرَاهِيَةً لَمْ يُعْطِهِ.
also referenced under: Book 37, Hadith 19 (In-Book) & Hadith 2279 (DarusSalam)