A slave who worships his Lord and he is also honest and faithful to his master
حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا سُفْيَانُ، عَنْ صَالِحٍ، عَنِ الشَّعْبِيِّ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى الأَشْعَرِيِّ ـ رضى الله عنه ـ قَالَ النَّبِيُّ صلى الله عليه وسلم " أَيُّمَا رَجُلٍ كَانَتْ لَهُ جَارِيَةٌ فَأَدَّبَهَا فَأَحْسَنَ تَأْدِيبَهَا، وَأَعْتَقَهَا وَتَزَوَّجَهَا، فَلَهُ أَجْرَانِ، وَأَيُّمَا عَبْدٍ أَدَّى حَقَّ اللَّهِ وَحَقَّ مَوَالِيهِ، فَلَهُ أَجْرَانِ ".
Narrated Abu Musa Al-Ash`ari: 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."