“If anyone of you (women) has a Mukatab, and he has enough (wealth) to pay off (his contact of manumission), she must veil herself from him.” (Using translation from Ibn Mājah 2520)

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ «إِذَا كَانَ لِإِحْدَاكُنَّ مُكَاتَبٌ وَكَانَ عِنْدَهُ مَا يُؤَدِّي فَلْتَحْتَجِبْ مِنْهُ»