‏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)....

‏الآداب : Hadeeth No:5359 'Ubaid b. Umair reported that Abu Musa brought permission from Umar (to enter the house) three times, and finding him busy came back, whereupon Umar said (to the Inmates of his house): Did you not hear the voice of 'Abdullah b. Qais (the Kunya of Abu Musa Ash'ari)? He was called back. and he (Hadrat...