Sahih Muslim Book 1, Hadith Number 108.

Chapter : Concerning diminution of Belief due to sins and its separation from the sinner; negation of the excellence of Islam at the time of committing sin.

It is reported on the authority of Qutaiba b. Sa’id who reported on the authority of Abu Huraira the hadith like that narrated from Zuhri with this exception that in the hadith narrated by ‘Ala’ and Safwan b. Sulaim there is no mention of: People raise there eyes towards him, and in the hadith narrated by Hammam: The believers raise their eyes towards him, and such like words, so long as he plunders (is not) a believer, and these words were added: And no exploiter who makes an exploitation is a believer as long as he exploits It; therefore avoid and shun (these evils).