Medicine
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ طَاوُسٍ، وَعَطَاءٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ احْتَجَمَ النَّبِيُّ صلى الله عليه وسلم وَهْوَ مُحْرِمٌ.Narrated Ibn `Abbas:The Prophet (ﷺ) was cupped while he was in a state of Ihram
From Sahih al-Bukhari, whose reports the scholars accept as authentic.