2. Allah's Apostle said, any man who has a slave girl whom he educates properly, teaches good manners, manumits & marries her, will get a double reward & if any man of the people of the Scriptures believes in his own prophet & then believes in me too, he will get a double reward & any slave who fulfills his duty to his master & to his Lord, will get a double reward." (SahihBukhari, Volume 7, Hadith 20)