Sahih Muslim , Book 20, Hadith 5 (In-Book) ⓘ

This hadith has been narrated on the authority of Sa'id b. Abu 'Aruba with the same chain of transmitters but with the addition: " If he (one of the joint owners emancipating the slave) has not (enough) money (to secure freedom for the other half) a fair price for the slave should be fixed, and he will be required to work to pay for his freedom, but must not be over-burdened.

وَحَدَّثَنَاهُ عَلِيُّ بْنُ خَشْرَمٍ، أَخْبَرَنَا عِيسَى، - يَعْنِي ابْنَ يُونُسَ - عَنْ سَعِيدِ بْنِ، أَبِي عَرُوبَةَ بِهَذَا الإِسْنَادِ وَزَادَ ‏ "‏ إِنْ لَمْ يَكُنْ لَهُ مَالٌ قُوِّمَ عَلَيْهِ الْعَبْدُ قِيمَةَ عَدْلٍ ثُمَّ يُسْتَسْعَى فِي نَصِيبِ الَّذِي لَمْ يُعْتِقْ غَيْرَ مَشْقُوقٍ عَلَيْهِ ‏" ‏ ‏.‏