Narrated Abu Musa:
The Prophet (ﷺ) said, 'The example of a good pious companion and an evil one is that of a person carrying musk and another blowing a pair of bellows. The one who is carrying musk will either give you some perfume as a present, or you will buy some from him, or you will get a good smell from him, but the one who is blowing a pair of bellows will either burn your clothes or you will get a bad smell from him."
Abu Musa reported Allah's Messenger (ﷺ) as saying: The similitude of good company and that of bad company is that of the owner of musk and of the one (iron-smith) blowing bellows, and the owner of musk would either offer you free of charge or you would buy it from him or you would. smell its pleasant odour, 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.