It is narrated from Hazrat Abu Musa (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Whoever has a slave-girl and gives her excellent education and teaches her good manners, then sets her free and marries her, he will receive a double reward. Similarly, a slave who fulfills the right of Allah and also fulfills the right of his master, or a person from the People of the Book who believed in the Shariah of Jesus and also believed in the Shariah of Muhammad (peace and blessings be upon him), he too will receive a double reward.