Abu Dawud
Fasting
Book Number: 007 / Hadith Number: 2361
Narated By Thawban : The Prophet (pbuh) said: A man who cupped and a man who has himself cupped broke their fast. The narrator Shayban said in his version: AbuQilabah told me that AbuAsma' ar-Rahbi told him that Thawban, the client of the Apostle of Allah (pbuh), told him that he heard the Prophet (pbuh) say this.