The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 1631

Zaid b. Arqam reported that the Messenger of Allah (may peace be upon him) went out to the people of Quba' and saw them observing prayer; upon this he said: The prayer of the penitent should be observed when the young weaned camels feel heat of the sun.

Source materials are from the University of Southern California MSA site
Hadith eBooks converted from Imaan Star