Narrated Jabir bin Abdullah (may Allah be pleased with him): The Messenger of Allah (peace and blessings be upon him) was on a journey when he saw a crowd of people around a man, and they were shading him. The Prophet (peace be upon him) asked, "What happened to him?" The people replied, "He is fasting." The Prophet (peace be upon him) said, "It is not righteousness to fast while traveling."