"The Messenger of Allah said: 'Whoever manumits his female slave, then marries her, he will have two rewards.'" (Using translation from Nasāʾī 3345)

قَالَ رَسُولُ اللهِ ﷺ «مَنْ أَعْتَقَ جَارِيَتَهُ ثُمَّ تَزَوَّجَهَا فَلَهُ أَجْرَانِ»