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."

لاَ إِلاَّ مِنْ أَجْلِ الضَّعْفِ وَزَادَ شَبَابَةُ حَدَّثَنَا شُعْبَةُ عَلَى عَهْدِ النَّبِيِّ ﷺ