Mishkat al-Masabih 11 Business Transactions كتاب البيوع 216

وَعَنِ ابْنِ عَبَّاسٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ احْتَجَمَ فَأَعْطَى الْحَجَّامَ أجره واستعط

Ibn ‘Abbas said the Prophet had himself cupped and gave the cupper his pay; and he poured medicine into his nose. (Bukhari and Muslim.)