Musannaf Ibn Abi Shayba 4:432

Yazid ibn Harun narrated to us, he said: Asim al-Ahwal informed us, from Abdullah ibn Zayd—and he is Abu Qilabah—from Abu al-Ash'ath al-San'ani, from Abu Asma al-Rahbi, from Shaddad ibn Aws, he said: I passed with the Messenger of Allah, may Allah bless him and grant him peace, on the eighteenth [day] that had passed of Ramadan. He saw a man who had been cupped. The Messenger of Allah, may Allah bless him and grant him peace, said: "The one who cups and the one who is cupped have broken their fast."