عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُمَا أَيُّمَا عَبْدٍ تَزَوَّجَ بِغَيْرِ إِذْنِ مَوَالِيهِ أَوْ أَهْلِهِ فَهُوَ عَاهِرٌ
Narrated by Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) that any slave who marries without the permission of his master or household will be considered an adulterer.