The Prophet (ﷺ) was cupped while he was fasting.
Sahih al-Bukhari Book 30, Hadith 46
← Previous Hadith The Prophet (ﷺ) was cupped while he was in the state of lhram, and also while he was observing a fast.

Sahih al-Bukhari Book 30, Hadith 45 Next Hadith → Anas bin Malik was asked whether they disliked the cupping for a fasting person. He replied in the negative and said, "Only if it causes weakness."

Sahih al-Bukhari Book 30, Hadith 47