Sahih Muslim - Book 40, Number 6867:
Abu Huraira reported: When the soul of a believer would go out (of his body) it would be received bv two angels who would take it to the sky. Hammad (one of the narrators in the chain of transmitters) mentioned the swetness of its odour, (and further said) that the dwellers of the sky say: Here comes the pious soul from the side of the earth Let there be blessings of Allah upon the body in which it resides. And it is carried (by the angels) to its Lord, the Exalted and Glorious. He would say: Take it to its destined end. And if he is a nonbeliever and as it (the soul) leaves the body-Hammad made a mention of its foul smell and of its being cursed-the dwellers of the sky say: There comes a dirty soul from the side of the earth, and it would be said: Take it to its destined end. Abu Huraira reported that Allah’s Messenger (may peace be upon him) put a thin cloth which was with him upon his nose while making a mention (of the foul smell) of the soul of a non-believer.
“I put my trust in Allah, my Lord and your Lord! There is not a moving creature, but He has a grasp of its forelock. Verily, my Lord is on the straight path. (The truth)”
(11:55-56)