NASAI-KUBRA 4936: from Ibn ʿUmar —
"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.'" (Using translation from Tirmidhī 1346)

الكبرى للنسائي ٤٩٣٦: عن ابن عمر —
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ أَعْتَقَ نَصِيبًا لَهُ أَوْ قَالَ شِقْصًا أَوْ قَالَ شِرْكًا لَهُ فِي عَبْدٍ وَكَانَ لَهُ مِنَ الْمَالِ مَا يَبْلُغُ ثَمَنَهُ بِقِيمَةِ عَدْلٍ فَهُوَ عَتِيقٌ وَإِلَّا فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ قَالَ أَيُّوبُ وَرُبَّمَا قَالَ نَافِعٌ هَذَا فِي الْحَدِيثِ وَرُبَّمَا لَمْ يَقُلْهُ فَلَا أَدْرِي هُوَ فِي الْحَدِيثِ أَمْ قَالَ نَافِعٌ مِنْ قِبَلِهِ يَعْنِي قَوْلَهُ فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ


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