Sunan Ibn Majah, Book 19, Hadith 2624 (In-Book) ⓘ

It was narrated from Ibn`Umar that the Messenger of Allah said: “Whoever frees his share of a slave, the price of the slave should be fairly evaluated, and he (the partner who initiated this process) should free him (in full, by giving the rest of his price to the other co-owners), if he has enough wealth to do so. Otherwise, he will have freed whatever he freed.”

حَدَّثَنَا يَحْيَى بْنُ حَكِيمٍ، حَدَّثَنَا عُثْمَانُ بْنُ عُمَرَ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ أَعْتَقَ شِرْكًا لَهُ فِي عَبْدٍ أُقِيمَ عَلَيْهِ بِقِيمَةِ عَدْلٍ فَأَعْطَى شُرَكَاءَهُ حِصَصَهُمْ إِنْ كَانَ لَهُ مِنَ الْمَالِ مَا يَبْلُغُ ثَمَنَهُ وَعَتَقَ عَلَيْهِ الْعَبْدُ وَإِلاَّ فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ ‏" ‏ ‏.‏