وَعَنْ أَُمِّ سَلَمَةَ رَضِيَ اَللَّهُ عَنْهَا
قَالَتْ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -«إِذَا كَانَ لِإِحْدَاكُنَّ مُكَاتَبٌ، وَكَانَ عِنْدَهُ مَا يُؤَدِّي، فَلْتَحْتَجِبْ مِنْهُ»
“When a slave of one of your women has made an agreement to pay for his freedom (i.e. he is a Mukatib) and can pay the full price, she must veil herself from him.” Related by Ahmad and the four Imams. At-Tirmidhi graded it as Sahih.
Bulugh al-Maram 1629, Book 15, Emancipation, Hadith 15. 1 min read