Narrated Abu Burda's father:
The Prophet (ﷺ) said, "Three persons will get their reward twice. (One is) a person who has a slave girl and he educates her properly and teaches her good manners properly (without violence) and then manumits and marries her. Such a person will get a double reward. (Another is) a believer from the people of the scriptures who has been a true believer and then he believes in the Prophet (ﷺ) (Muhammad). Such a person will get a double reward. (The third is) a slave who observes Allah's Rights and Obligations and is sincere to his master."
Reference | : Sahih al-Bukhari 3011 |
In-book reference | : Book 56, Hadith 220 |
USC-MSA web (English) reference | : Vol. 4, Book 52, Hadith 255 |
(deprecated numbering scheme) |