on his father's authority, told that his grandfather reported the Prophet ﷺ said: 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.  

عَنِ النَّبِيِّ ﷺ قَالَ الْمُكَاتَبُ عَبْدٌ مَا بَقِيَ عَلَيْهِ مِنْ مُكَاتَبَتِهِ دِرْهَمٌ  

On his father's authority, told that his grandfather reported the Prophet ﷺ said: If any slave entered into an agreement to buy his freedom for one hundred uqiyahs and he pays them all but ten, he remains a slave (until he pays the remaining ten); and if a slave entered into an agreement to purchase his freedom for one hundred dinars, and he pays them all but ten dinars, he remains a slave (until he pays the remaining ten). Abu Dawud said: This narrator 'Abbas al-Jariri is not the same person. They said: It is misunderstanding. He is some other narrator.  

أَنَّ النَّبِيَّ ﷺ قَالَ أَيُّمَا عَبْدٍ كَاتَبَ عَلَى مِائَةِ أُوقِيَّةٍ فَأَدَّاهَا إِلاَّ عَشْرَةَ أَوَاقٍ فَهُوَ عَبْدٌ وَأَيُّمَا عَبْدٍ كَاتَبَ عَلَى مِائَةِ دِينَارٍ فَأَدَّاهَا إِلاَّ عَشْرَةَ دَنَانِيرَ فَهُوَ عَبْدٌ  

The Messenger of Allah ﷺ said to us: If one of you has a slave, and he enters into an agreement to purchase his freedom, and can pay the full price, she must veil herself from him.  

لَنَا رَسُولُ اللَّهِ ﷺ إِنْ كَانَ لإِحْدَاكُنَّ مُكَاتَبٌ فَكَانَ عِنْدَهُ مَا يُؤَدِّي فَلْتَحْتَجِبْ مِنْهُ