Abu Dawud
Fasting
Book Number: 007 / Hadith Number: 2358
Narated By A Companion of the Prophet : AbuBakr ibn AbdurRahman reported on the authority of a Companion of the Prophet (pbuh): I saw the Prophet (pbuh) commanding the people while he was travelling on the occasion of the conquest of Mecca not to observe fast. He said: Be strong for your enemy. The Apostle of Allah (pbuh) fasted himself.