It is narrated from Hazrat Abu Darda (may Allah be pleased with him) that once we were on a journey with the Prophet Muhammad (peace and blessings be upon him) in intense heat, and due to the severity of the heat, we would place our hands on our heads. On that occasion, none of us was fasting except the Prophet Muhammad (peace and blessings be upon him) and Hazrat Abdullah bin Rawaha (may Allah be pleased with him).