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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
abudawud:3941 – Muʾammal > Ismāʿīl > Ayyūb > Nāfiʿ > Ibn ʿUmar

He will be emancipated to the extent of the share which he emancipated, and sometimes he did not say these words.  

أبو داود:٣٩٤١ – حَدَّثَنَا مُؤَمَّلٌ حَدَّثَنَا إِسْمَاعِيلُ عَنْ أَيُّوبَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ

عَنِ النَّبِيِّ ﷺ بِمَعْنَاهُ قَالَ وَكَانَ نَافِعٌ رُبَّمَا قَالَ فَقَدْ عَتَقَ مِنْهُ مَا عَتَقَ وَرُبَّمَا لَمْ يَقُلْهُ