صَحِيحُ مُسْلِمٍ
Sahih Muslim 154 b
The Book of Marriage
The virute of manumitting one's slave girl, then marrying her
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا خَالِدُ بْنُ عَبْدِ اللَّهِ، عَنْ مُطَرِّفٍ، عَنْ عَامِرٍ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي الَّذِي يُعْتِقُ جَارِيَتَهُ ثُمَّ يَتَزَوَّجُهَا لَهُ أَجْرَانِ .
Abu Musa reported that Allah's Messenger (ﷺ) said about one who emancipated a slave woman, and then married her, that for him there are two rewards.
Sahih Muslim, 154 bSahihصحيح