Prophet Muhammad (peace be upon him) said: “The example of a good companion and a bad companion is like that of the seller of musk, and the one who blows the blacksmith’s bellows (respectively). So as for the seller of musk then either he will grant you some, or you buy some from him, or at least you enjoy a pleasant smell from him. As for the one who blows the blacksmith’s bellows then either he will burn your clothes or you will get an offensive smell from him.” [Bukhari & Muslim]
