Hadith 458:14
Yunus narrated to us, Hammad bin Zayd narrated to us, Ayyub narrated to us, from Abu Qilabah, from Abu al-Ash'ath, from Shaddad bin Aws, who said: While I was walking with the Messenger of Allah (peace and blessings of Allah be upon him) in one of the paths of Medina on the eighteenth day that had passed of Ramadan, and he was holding my hand, he passed by a man who was being cupped. The Messenger of Allah (peace and blessings of Allah be upon him) said: "The one who cups and the one who is cupped have broken their fast."
حدثنا يونس، حدثنا حماد بن زيد، حدثنا أيوب، عن أبي قلابة، عن أبي الأشعث، عن شداد بن أوس، قال: بينما أنا أمشي مع رسول الله صلى الله عليه وسلم في بعض طرق المدينة لثمان عشرة مضت من رمضان، وهو آخذ بيدي، فمر على رجل يحتجم، فقال رسول الله صلى الله عليه وسلم: " أفطر الحاجم والمحجوم "