Al-Lu'lu Wal-Marjan 98 — The Book of Belief (Faith)

Abu Dharr Narrated from:

I entered the mosque while Allâh's Messenger صلى الله عليه وسلم was sitting there. When the sun had set, the Prophet صلى الله عليه وسلم said, "O Abû Dhar! Do you know where this (sun) goes?" I said, "Allâh and His Messenger صلى الله عليه وسلم know better." He said, "It goes and asks permission to prostrate, and it is allowed, and (one day) it, as if being ordered to return whence it came, then it will rise from the west."Then the Prophet صلى الله عليه وسلم recited, "And the sun runs on its fixed course for a term (appointed)..." (V.36:38)( Sahîh Al-Bukhâri, Hadîth No. 520, Vol. 9)