‏الأيمان : Hadeeth No:4101 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: It is good for a slave that he worships Allaah well, and serves his master (well). It is good for him....

‏فضائل الصحابة‏ : Hadeeth No:6018 Abu Musa. reported: I came to Allaah's Messenger (sallAllaahu alayhi wa sallam) and thought that 'Abdullah was amongst the members of the family, or like that....