It is narrated from Sayyiduna Rafi' bin Khadij (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said something similar (about the fast of the one who performs cupping and the one who has it done being broken). The student of hadith should know that, of these two chains of Yahya bin Abi Kathir, Imam Ahmad bin Hanbal judged one to be authentic and Ali bin al-Madini judged the other to be authentic; therefore one cannot be faulted on account of the other.