Mukhtasar Bukhari

Narrated Anas (may Allah be pleased with him): We were on a journey with the Prophet (peace and blessings of Allah be upon him). The person who had the most shade among us was the one who had made shade with his cloak. Those who were fasting did not do any work, and those who were not fasting lifted up the water skins, filled them with water, and did all kinds of service and work. So the Prophet (peace and blessings of Allah be upon him) said: "Today, those who did not fast have taken all the reward."