Sahih Bukhari 2548

Narrated Abu Huraira: The Prophet said, Goodness and comfort are for him who worships his Lord in a perfect manner and serves his master sincerely. ..

Narrated `Abdullah: The Prophet said, If a slave serves his Saiyid (i.e. master) sincerely and worships his Lord (Allah) perfectly, he will get a double reward. ..

Narrated Abu Musa: The Prophet said, The Mamluk (slave) who worships his Lord in a perfect manner, and is dutiful, sincere and obedient to his Saiyid (master), will get a double reward. ..

Narrated Abu Huraira: The Prophet said, You should not say, 'Feed your lord (Rabbaka), help your lord in performing ablution, or give water to your lord, but should say, 'my master (e.g. Feed your master instead of lord etc.) (Saiyidi), or my..

Narrated Ibn `Umar: The Prophet said, If one manumits his share of a common slave (Abd), and he has money sufficient to free the remaining portion of the price of the slave (justly estimated), then he should free the slave completely by paying..

Narrated `Abdullah: Allah's Apostle said, Everyone of you is a guardian and is responsible for his charges. The ruler who has authority over people, is a guardian and is responsible for them, a man is a guardian of his family and is responsible..