Hadith on Reward: A double reward for People of the Book who embrace Islam, an honest servant, and a man who educates and marries his servant girl

Abu Burda reported from his father: The Messenger of Allah, peace be upon him, said, “Three persons will receive a double reward: a man from the People of the Book who believes in his prophet and believes in Muhammad; a servant owned by his master who fulfills the rights of Allah and his master; and a man who owns a servant girl and he mentors her, teaches her beautiful manners, and educates her in the best way, then he emancipates her and marries her. These will have a double reward.”

[Sahih Bukhari, Book 3, Number 97]

أَبُو بُرْدَةَ عَنْ أَبِيهِ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَلَاثَةٌ لَهُمْ أَجْرَانِ رَجُلٌ مِنْ أَهْلِ الْكِتَابِ آمَنَ بِنَبِيِّهِ وَآمَنَ بِمُحَمَّدٍ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَالْعَبْدُ الْمَمْلُوكُ إِذَا أَدَّى حَقَّ اللَّهِ وَحَقَّ مَوَالِيهِ وَرَجُلٌ كَانَتْ عِنْدَهُ أَمَةٌ فَأَدَّبَهَا فَأَحْسَنَ تَأْدِيبَهَا وَعَلَّمَهَا فَأَحْسَنَ تَعْلِيمَهَا ثُمَّ أَعْتَقَهَا فَتَزَوَّجَهَا فَلَهُ أَجْرَانِ

صحيح البخاري  كِتَاب الْعِلْمِ  بَاب تَعْلِيمِ الرَّجُلِ أَمَتَهُ وَأَهْلَهُ