Musnad Abu Ya'la al-Mawsili 155:368

Abu Bakr ibn Abi Shaybah narrated to us, Muhammad ibn Fudayl narrated to us, from Abu Isma'il, from Abu Hazim, from Abu Hurayrah, who said: We camped with the Messenger of Allah (may Allah bless him and grant him peace) one night, and we did not wake up until the sun hurt us (i.e., its heat reached us). The Prophet (may Allah bless him and grant him peace) said: "Let every man take the head of his mount, then move away from these dwellings." Then he called for water and performed ablution, then he prostrated two prostrations, then the prayer was called.