Sahih al-Bukhari 1938
صحيح البخاري#1938Sahihحَدَّثَنَا مُعَلَّى بْنُ أَسَدٍ، حَدَّثَنَا وُهَيْبٌ، عَنْ أَيُّوبَ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم احْتَجَمَ، وَهْوَ مُحْرِمٌ وَاحْتَجَمَ وَهْوَ صَائِمٌ.
Narrated Ibn `Abbas:The Prophet (ﷺ) was cupped while he was in the state of Ihram, and also while he was observing a fast
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 30:45