مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3399
Emancipation
Emancipating a Slave who is jointly owned, buying a relative, and emancipating during an illness - Section 2
وَعَنْ عَمْرِو بْنِ شُعَيْبٍ عَنْ أَبِيهِ عَنْ جَدِّهِ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «الْمُكَاتَبُ عَبْدٌ مَا بَقِيَ عَلَيْهِ مِنْ مُكَاتبَته دِرْهَم» . رَوَاهُ أَبُو دَاوُد
‘Amr b. Shu'aib, on his father's authority, told that this grandfather reported the Prophet (ﷺ) as saying, “A slave who has entered into an agreement to purchase his freedom is a slave as long as a dirham of the agreed price remains to be paid." Abu Dawud transmitted it.
Mishkat al-Masabih, 3399