"The Prophet passed judgment concerning a man who had intercourse with his wife's slave woman: 'If he forced her, then she is free, and he has to give her mistress a similar slave as a replacement; if she obeyed him in that, then she belongs to him, and he has to give her mistress a similar slave as a replacement.'" (Using translation from Nasāʾī 3363)
قَضَى رَسُولُ اللهِ ﷺ فِي رَجُلٍ وَطَأَ جَارِيَةَ امْرَأَتَهِ «إِنْ كَانَ اسْتَكْرَهَهَا فَهِيَ حُرَّةٌ وَعَلَيْهِ لِسَيِّدَتِهَا مِثْلُهَا وَإِنْ كَانَتْ طَاوَعَتْهُ فَهِيَ لَهُ أَمَةٌ وَعَلَيْهِ لِسَيِّدَتِهَا مِثْلُهَا»