(35) باب مَا جَاءَ فِي الْمُكَاتَبِ إِذَا كَانَ عِنْدَهُ مَا يُؤَدِّي
Narrated Umm Salamah:
That the Messenger of Allah (ﷺ) said: "When one of you (women) has a Mukatab ho has with him what will fulfill (the Kitabah) then observe Hijab from him."[Abu 'Eisa said:] This Hadith is Hasan Sahih. And the meaning of this Hadith according to the people of knowledge is that of caution. They say that the Mukatab is not freed, even if he has the amount to pay, until he pays it.
Reference: Jami` at-Tirmidhi 1261
In-book reference: Book 14, Hadith 63
English translation: Vol. 1, Book 12, Hadith 1261