The Prophet ﷺ said, "Whoever manumits his share o a jointly possessed slave, it is imperative on him to manumit the slave completely if he has sufficient money to pay the rest of its price which is to be estimated justly. He should pay his partners their shares and release him (the freed one).  

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَعْتَقَ شِرْكًا لَهُ فِي مَمْلُوكٍ وَجَبَ عَلَيْهِ أَنْ يُعْتِقَ كُلَّهُ إِنْ كَانَ لَهُ مَالٌ قَدْرَ ثَمَنِهِ يُقَامُ قِيمَةَ عَدْلٍ وَيُعْطَى شُرَكَاؤُهُ حِصَّتَهُمْ وَيُخَلَّى سَبِيلُ الْمُعْتَقِ  

“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.”  

قَالَ رَسُولُ اللَّهِ ﷺ 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  

“If a person frees his share of a slave, and has enough Money to pay the full price of the slave, a fair price should be worked out for the slave, and his partners should be given their shares, then he may free the slave, otherwise he has freed only what he has freed.” (Using translation from Aḥmad 397)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ مَنْ أَعْتَقَ شِرْكًا فِي عَبْدٍ فَكَانَ لَهُ مَالٌ يَبْلُغُ ثَمَنَ الْعَبْدِ فَإِنَّهُ يُقَوَّمُ عَلَيْهِ قِيمَةَ عَدْلٍ فَيُعْطَى شُرَكَاؤُهُ حِصَصَهُمْ وَعَتَقَ الْعَبْدُ عَلَيْهِ وَإِلَّا فَقَدْ عَتَقَ مَا عَتَقَ  

[Machine] The Messenger of Allah ﷺ said: "Whoever frees a slave that he co-owns, then he has freed all of him if the partner (co-owner) has enough money to cover his share, and a fair price will be set for him and paid to his partners, and his path will be left open."  

قَالَ رَسُولُ اللهِ ﷺ «مَنْ أَعْتَقَ شِرْكًا فِي عَبْدٍ فَقَدْ أَعْتَقَ كُلَّهُ إِنْ كَانَ لِلَّذِي أَعْتَقَ نَصِيبَهُ مِنَ الْمَالِ مَا يَبْلُغُ ثَمَنَهُ يُقَامُ عَلَيْهِ قِيمَةَ عَدْلٍ فَيَدْفَعُ إِلَى شُرَكَائِهِ أَنْصِبَاءَهُمْ وَيُخَلَّى سَبِيلُهُ»