It wasnarrated that Thawban said:
"I heard the Prophet (ﷺ) say:'Thecupper and the one for whom cupping is done both break theirfast.'" (JA)
English reference (JA): Vol. 1, Book 7, Hadith 1680 (JA)
Arabic reference (JA): Book 7, Hadith 1750 (JA)