‏البيوع : Hadeeth No:3768 This hadith is transmitted on the authority of Abu Muawiya (but With a slight change of words)....

‏الإمارة : Hadeeth No:4525 It has been narrated on the authority of Abu Dharr who said: My friend (i. e. the Prophet) advised me to listen (to the man in position of authority) and obey (him) even if he were a slave maimed (and disabled)....