Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai-kubra:4940 – ʿAmr b. ʿAlī > ʿAbd al-Wahhāb > Yaḥyá b. Saʿīd > Nāfiʿ > ʿAbdullāh b. ʿUmar

[Machine] I heard the Prophet of Allah ﷺ saying, "Whoever emancipates a share from his slave, he will be responsible for what remains and should free him." And Nafi' said, Yahya said, "I do not know if he meant something in the past or something in the Hadith, if he did not have it, then what he did was permissible."  

الكبرى للنسائي:٤٩٤٠ – أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ قَالَ سَمِعْتُ يَحْيَى بْنَ سَعِيدٍ يَقُولُ سَمِعْتُ نَافِعًا يُحَدِّثُ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ قَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَنْ أَعْتَقَ نَصِيبًا لَهُ فِي مَمْلُوكٍ كُلِّفَ مَا بَقِيَ فَأَعْتَقَهُ» وَكَانَ نَافِعٌ يَقُولُ قَالَ يَحْيَى لَا أَدْرِي شَيْئًا كَانَ مِنْ قِبَلِهِ يَقُولُهُ أَمْ شَيْءٌ فِي الْحَدِيثِ «فَإِنْ لَمْ يَكُنْ عِنْدَهُ فَقَدْ جَازَ مَا صَنَعَ»  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:21345 – [Chain 1] Abū ʿAbdullāh al-Ḥāfiẓ > Abū Bakr Aḥmad b. Salmān al-Faqīh > al-Ḥasan b. Mukram > Yazīd b. Hārūn > Yaḥyá b. Saʿīd [Chain 2] Abū Aḥmad al-Ḥāfiẓ > ʿAbdullāh b. Sulaymān b. al-Ashʿath > ʿAmr b. ʿAlī

[Machine] I heard the Messenger of Allah ﷺ saying, "Whoever frees a share of a slave is obligated to free the rest, and the emancipator should be helpful." Yahya said, "I don't know if he meant something he used to say before or if it was something related to this statement. If he doesn't have it, then what he did is permissible."  

البيهقي:٢١٣٤٥ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو بَكْرٍ أَحْمَدُ بْنُ سَلْمَانَ الْفَقِيهُ ثنا الْحَسَنُ بْنُ مُكْرَمٍ ثنا يَزِيدُ بْنُ هَارُونَ أنبأ يَحْيَى بْنُ سَعِيدٍ ح قَالَ وَأَخْبَرَنِي أَبُو أَحْمَدَ الْحَافِظُ وَاللَّفْظُ لَهُ أنبأ عَبْدُ اللهِ بْنُ سُلَيْمَانَ بْنِ الْأَشْعَثِ ثنا عَمْرُو بْنُ عَلِيٍّ ثنا عَبْدُ الْوَهَّابِ الثَّقَفِيُّ قَالَ سَمِعْتُ يَحْيَى بْنَ سَعِيدٍ يَقُولُ سَمِعْتُ نَافِعًا يُحَدِّثُ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ قَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَنْ أَعْتَقَ نَصِيبًا فِي مَمْلُوكٍ كُلِّفَ مَا بَقِيَ فَأَعْتَقَهُ وَكَانَ نَافِعٌ يَقُولُ قَالَ يَحْيَى لَا أَدْرِي شَيْئًا كَانَ مِنْ قِبَلِهِ يَقُولُهُ أَمْ هُوَ شَيْءٌ فِي الْحَدِيثِ؟ فَإِنْ لَمْ يَكُنْ عِنْدَهُ فَقَدْ جَازَ مَا صَنَعَ  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ مُحَمَّدِ بْنِ الْمُثَنَّى عَنْ عَبْدِ الْوَهَّابِ