Aboo Moosaa ( رضي ) الله عنه reported Allaah’s Messenger ( )صلى الله عليه وسلم as saying:
“The similitude of good company and that of bad company is that of the owner of musk and of the iron-smith blowing bellows. The owner of musk would either offer you some musk free of charge or you would buy it from him, or you would smell its pleasant odor, and so far as one who blows the bellows is concerned, he would either burn your clothes or you shall have to smell its repugnant smell.” [Chapter: It Is Recommend To Keep Company With Righteous People And Avoid Bad Company, Book 45, Hadeeth 189 Sahih Muslim 2628]