Musnad Abu Ya'la al-Mawsili 108:13

'Abd al-A'la narrated to us, Hammad narrated to us, from Abu al-Zubayr, from Jabir, that the Prophet (may Allah bless him and grant him peace) traveled during Ramadan. The fasting became difficult for a man among his companions, and his she-camel began to wander with him under the shade of the trees. The Prophet (may Allah bless him and grant him peace) was informed of this, so he commanded him, and he broke his fast. Then the Messenger of Allah (may Allah bless him and grant him peace) called for a vessel containing water and placed it upon his hand. When the people saw him drink, they drank.