Sahih al-Bukhari 49:36
Narrated Ibn `Umar:
The Prophet (ﷺ) said, "If one manumits his share of a common slave (Abd), and he has money sufficient to free the remaining portion of the price of the slave (justly estimated), then he should free the slave completely by paying the rest of his price; otherwise the slave is freed partly. "
Reference
Sahih al-Bukhari 49:36
In-book reference
Book 49, Hadith 36
Arabic Text
حَدَّثَنَا أَبُو النُّعْمَانِ، حَدَّثَنَا جَرِيرُ بْنُ حَازِمٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " مَنْ أَعْتَقَ نَصِيبًا لَهُ مِنَ الْعَبْدِ، فَكَانَ لَهُ مِنَ الْمَالِ مَا يَبْلُغُ قِيمَتَهُ، يُقَوَّمُ عَلَيْهِ قِيمَةَ عَدْلٍ، وَأُعْتِقَ مِنْ مَالِهِ، وَإِلاَّ فَقَدْ عَتَقَ مِنْهُ ".