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