Mukhtasar Bukhari (Abridged) 1926 — on musk

Narrated from Sayyiduna Abu Musa (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "The example of a good friend and a bad friend is like that of a perfume seller and a blacksmith who blows the bellows. The perfume seller will either give you some perfume, or you will buy it from him, or at least you will smell a pleasant fragrance (thus, in the company of the righteous, there is benefit in every way). As for the blacksmith who blows the bellows, he will either burn your clothes (with flying sparks), or at the very least you will smell a foul odor."