Messenger of Allah ﷺ said "Three persons will have a double reward: 1. A Person from the people of the scriptures who believed in his prophet (Jesus or Moses) and then believed in the Prophet ﷺ Muhammad (i .e. has embraced Islam). 2. A slave who discharges his duties to Allah and his master. 3. A master of a woman-slave who teaches her good manners and educates her in the best possible way (the religion) and manumits her and then marries her."  

رَسُولُ اللَّهِ ﷺ: «ثَلاَثَةٌ لَهُمْ أَجْرَانِ: (١) رَجُلٌ مِنْ أَهْلِ الْكِتَابِ آمَنَ بِنَبِيِّهِ وَآمَنَ بِمُحَمَّدٍ ﷺ، (٢) وَالْعَبْدُ الْمَمْلُوكُ إِذَا أَدَّى حَقَّ اللَّهِ وَحَقَّ مَوَالِيهِ، (٣) وَرَجُلٌ كَانَتْ عِنْدَهُ أَمَةٌ (يَطَؤُهَا) فَأَدَّبَهَا فَأَحْسَنَ تَأْدِيبَهَا وَعَلَّمَهَا فَأَحْسَنَ تَعْلِيمَهَا ثُمَّ أَعْتَقَهَا فَتَزَوَّجَهَا فَلَهُ أَجْرَانِ۔»  

The Prophet ﷺ said, "He who has a slave-girl and teaches her good manners and improves her education and then manumits and marries her, will get a double reward; and any slave who observes Allah's right and his master's right will get a double reward."  

عَنْ أَبِي مُوسَى الأَشْعَرِيِّ ؓ قَالَ النَّبِيُّ ﷺ أَيُّمَا رَجُلٍ كَانَتْ لَهُ جَارِيَةٌ فَأَدَّبَهَا فَأَحْسَنَ تَأْدِيبَهَا وَأَعْتَقَهَا وَتَزَوَّجَهَا فَلَهُ أَجْرَانِ وَأَيُّمَا عَبْدٍ أَدَّى حَقَّ اللَّهِ وَحَقَّ مَوَالِيهِ فَلَهُ أَجْرَانِ  

[Machine] On the authority of the Prophet ﷺ , he said: "Whoever has a slave girl and teaches her, and behaves well towards her, and teaches her good manners, and then frees her and marries her, he will have two rewards. And a servant who fulfills the rights of Allah (may He be exalted) and the rights of his slaves, and a man from the people of the Book who believes in what Jesus brought and what Muhammad ﷺ brought, he will have two rewards."  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ كَانَتْ لَهُ أَمَةٌ فَعَلَّمَهَا فَأَحْسَنَ تَعْلِيمَهَا وَأَدَّبَهَا فَأَحْسَنَ تَأْدِيبَهَا وَأَعْتَقَهَا فَتَزَوَّجَهَا فَلَهُ أَجْرَانِ وَعَبْدٌ أَدَّى حَقَّ اللهِ ﷻ وَحَقَّ مَوَالِيهِ وَرَجُلٌ مِنْ أَهْلِ الْكِتَابِ آمَنَ بِمَا جَاءَ بِهِ عِيسَى وَمَا جَاءَ بِهِ مُحَمَّدٌ ﷺ فَلَهُ أَجْرَانِ  

'Whoever has a slave woman and teaches her good manners and educates her, then sets her free and marries her, will have two rewards. Any man from among the People of the Book who believed in his Prophet and believed in Muhammad will have two rewards. Any slave who does his duty towards Allah and towards his masters will have two rewards.” (Sahih)(one of the narrators) Salih said: “Sha'bi said: 'I have given this (Hadith) to you for little effort on your part. A rider would travel to Al-Madinah for less than this.' ” (Using translation from Ibn Mājah 1956)   

قَالَ رَسُولُ اللهِ ﷺ مَنْكَانَتْ لَهُ جَارِيَةٌ فَأَدَّبَهَا فَأَحْسَنَ أَدَبَهَا وَعَلَّمَهَا فَأَحْسَنَ تَعْلِيمَهَا ثُمَّ أَعْتَقَهَا وَتَزَوَّجَهَا فَلَهُ أَجْرَانِ وَأَيُّمَا رَجُلٍ مِنْ أَهْلِ الْكِتَابِ آمَنَ بِنَبِيِّهِ وَآمَنَ بِمُحَمَّدٍ فَلَهُ أَجْرَانِ وَأَيُّمَا عَبْدٍ مَمْلُوكٍ أَدَّى حَقَّ اللهِ ﷻ عَلَيْهِ وَحَقَّ مَوَالِيهِ فَلَهُ أَجْرَانِ  

[Machine] "To the common people, we say that when a man frees his slave, marries her, and treats her well, he will be rewarded like the one who owns a mount. Sha'bi told me that Abu Burdah informed him from Abu Musa who said that the Messenger of Allah ﷺ said: 'When a man educates his slave woman and teaches her well, then frees her and marries her, he will receive double reward. And if a man believes in Jesus and then believes in me, he will receive double reward. And when a servant fears his Lord and obeys his master, he will receive double reward.'"  

لِلشَّعْبِيِّ إِنَّا نَقُولُ عِنْدَنَا إِنَّ الرَّجُلَ إِذَا أَعْتَقَ أُمَّ وَلَدِهِ ثُمَّ تَزَوَّجَهَا فَهُوَ كَالرَّاكِبِ هَدْيَهُ قَالَ الشَّعْبِيُّ أَخْبَرَنِي أَبُو بُرْدَةَ عَنْ أَبِي مُوسَى قَالَ قَالَ رَسُولُ اللَّهِ ﷺ «إِذَا أَدَّبَ الرَّجُلُ أَمَتَهُ وَأَحْسَنَ تَأْدِيبَهَا وَعَلَّمَهَا فَأَحْسَنَ تَعْلِيمَهَا ثُمَّ أَعْتَقَهَا وَتَزَوَّجَهَا كَانَ لَهُ أَجْرَانِ وَإِذَا آمَنَ الرَّجُلُ بِعِيسَى ثُمَّ آمَنَ بِي فَلَهُ أَجْرَانِ وَالْعَبْدُ إِذَا اتَّقَى رَبَّهُ وَأَطَاعَ مَوَالِيَهُ فَلَهُ أَجْرَانِ»