The Book of Prayers (Kitab Al-Salat)

Muslim :: Book 4 : Hadith 1009

'A'isha reported: The Messenger of Allah (may peace be upon him) was asked in the expedition of Tabuk about the sutra the worshipper; he said: Like the back of the saddle.

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