What was the journey that the Prophet Muhammad (saw) took with his companions on a hot day that none of them were fasting except the Prophet Muhammad (saw) and Ibn Rawaha (peace be upon him)?
 Narrated Abu Ad-Darda:                     We set out with Allah's Apostle on one of his journeys on a very hot day, and it was so hot that one had to put his hand over his head because of the severity of heat. None of us was fasting except the Prophet and Ibn Rawaha.