Salih ibn Hayy reported that a man said to 'Amir ash-Shu'bi, "Abu 'Amr! We say that when a man frees his umm walad and then marries her, he is like the one who rides his camel." 'Amir said, "Abu Burda related to me from his father that the Messenger of Allah, may Allah bless him and grant him peace, said to them: 'Three have a double reward: one of the People of the Book who believes in his Prophet and then believes in Muhammad has two rewards. When a slave carries out the due of Allah and the due of his master, he has a double reward. And (the third is) a man who has a slavegirl with whom he has intercourse and teaches her well and instructs her well and then sets her free and marries her. He has two rewards.'"