Musnad Abu Ya'la al-Mawsili 243:49

Abu Kuraib narrated to us, Yahya bin Burayd narrated to us, he said: My father informed me, from Abu Burdah, from Abu Musa, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The companion of goodness and the companion of evil are like the carrier of musk and the blower of the bellows. As for the carrier of musk, he will either give you some, or you will find a pleasant scent. And as for the blower of the bellows, he will either burn your clothes, or you will find a foul odor."