What did the Prophet Muhammad (peace be upon him) say about people who manumit and marry their slave girls after teaching them good manners and educating them properly?
 Narrated Abu Musa Al-Ash`ari:                     Allah's Apostle said, "If a person teaches his slave girl good manners properly, educates her properly, and then manumits and marries her, he will get a double reward. And if a man believes in Jesus and then believes in me, he will get a double reward. And if a slave fears his Lord (i.e. Allah) and obeys his masters, he too will get a double reward."