'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.' ”  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ كَانَتْ 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 اللَّهِ عَلَيْهِ وَحَقَّ مَوَالِيهِ فَلَهُ أَجْرَانِ قَالَ صَالِحٌ قَالَ الشَّعْبِيُّ قَدْ أَعْطَيْتُكَهَا بِغَيْرِ شَىْءٍ إِنْ كَانَ الرَّاكِبُ لَيَرْكَبُ فِيمَا دُونَهَا إِلَى الْمَدِينَةِ  

“Safiyyah was given to Dihyah Al-Kalbi (as his share of the war booty), then she was given to the Messenger of Allah after that. He married her, and made her ransom (i.e., freedom from slavery) her dowry.” (Sahih)Hammad said: “Abdul-'Aziz said to Thabit: 'O Abu Muhammad! Did you ask Anas what her bridal-money was?' He said: 'Her bridal-money was her freedom.' ”  

صَارَتْ صَفِيَّةُ لِدِحْيَةَ الْكَلْبِيِّ ثُمَّ صَارَتْ لِرَسُولِ اللَّهِ ﷺ بَعْدُ فَتَزَوَّجَهَا وَجَعَلَ عِتْقَهَا صَدَاقَهَا قَالَ حَمَّادٌ فَقَالَ عَبْدُ الْعَزِيزِ لِثَابِتٍ يَا أَبَا مُحَمَّدٍ أَنْتَ سَأَلْتَ أَنَسًا مَا أَمْهَرَهَا قَالَ أَمْهَرَهَا نَفْسَهَا  

that the Messenger of Allah ﷺ set Safiyyah free, and made her ransom her dowry, and he married her.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَعْتَقَ صَفِيَّةَ وَجَعَلَ عِتْقَهَا صَدَاقَهَا وَتَزَوَّجَهَا