The Book of Marriage
26/65. Chapter:
A Man Manumitting His Slave Woman, Then Marrying Her
Sunan an-Nasai
أَخْبَرَنَا هَنَّادُ بْنُ السَّرِيِّ، عَنْ أَبِي زُبَيْدٍ، عَبْثَرِ بْنِ الْقَاسِمِ عَنْ مُطَرِّفٍ، عَنْ عَامِرٍ، عَنْ أَبِي بُرْدَةَ، عَنْ أَبِي مُوسَى، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ أَعْتَقَ جَارِيَتَهُ ثُمَّ تَزَوَّجَهَا فَلَهُ أَجْرَانِ " .
It was narrated that Abu Musa said: "The Messenger of Allah said: 'Whoever manumits his female slave, then marries her, he will have two rewards.'"
Reference : Sunan an-Nasa'i 3345In-book reference : Book 26, Hadith 150English translation : Vol. 4, Book 26, Hadith 3347