Jami` At-Tirmidhi - جامع الترمذي
15. The Chapters On Judgements From The Messenger of Allah - كتاب الأحكام عن رسول الله صلى الله عليه وسلم
14) Chapter: What Has Been Related About A Slave Owned By Two Men And One Of Them Frees His Portion Of Him
Ibn 'Umar narrated that the Prophet (ﷺ) said:
"Whoever frees a portion" or, he said: "a part" or he said: "a share he owns of a slave, then he can afford the remainder of the price according to the reasonable price, then he will be free. Otherwise he has freed as much as he has freed (only)." Ayyub (one of the narrators) said: "Perhaps Nafi said in this Hadith: 'Meaning he has freed as much of him as he has freed.'"
14) باب مَا جَاءَ فِي الْعَبْدِ يَكُونُ بَيْنَ الرَّجُلَيْنِ فَيُعْتِقُ أَحَدُهُمَا نَصِيبَهُ
حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ . قَالَ أَيُّوبُ وَرُبَّمَا قَالَ نَافِعٌ فِي هَذَا الْحَدِيثِ يَعْنِي فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ . قَالَ أَبُو عِيسَى حَدِيثُ ابْنِ عُمَرَ حَدِيثٌ حَسَنٌ صَحِيحٌ وَقَدْ رَوَاهُ سَالِمٌ عَنْ أَبِيهِ عَنِ النَّبِيِّ صلى الله عليه وسلم نَحْوَهُ . " مَنْ أَعْتَقَ نَصِيبًا - أَوْ قَالَ شِقْصًا أَوْ قَالَ شِرْكًا لَهُ فِي عَبْدٍ فَكَانَ لَهُ مِنَ الْمَالِ مَا يَبْلُغُ ثَمَنَهُ بِقِيمَةِ الْعَدْلِ فَهُوَ عَتِيقٌ وَإِلاَّ فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ "