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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
muslim:997b – Yaʿqūb b. Ibrāhīm al-Dawraqī > Ismāʿīl / Ibn ʿUlayyah > Ayyūb > Abū al-Zubayr > Jābir > a man from al-Anṣār Yuqāl Lah Abū Madhkūr Aʿtaq Ghulām Lah > Dubur

Jabir reported that a person among the Ansar who was called Abu Madhkur granted posthumous freedom to his slave who was called Ya'qub. The rest of the hadith is the same.  

مسلم:٩٩٧b – وَحَدَّثَنِي يَعْقُوبُ بْنُ إِبْرَاهِيمَ الدَّوْرَقِيُّ حَدَّثَنَا إِسْمَاعِيلُ يَعْنِي ابْنَ عُلَيَّةَ عَنْ أَيُّوبَ عَنْ أَبِي الزُّبَيْرِ عَنْ جَابِرٍ أَنَّ رَجُلاً مِنَ الأَنْصَارِ

يُقَالُ لَهُ أَبُو مَذْكُورٍ أَعْتَقَ غُلاَمًا لَهُ عَنْ دُبُرٍ يُقَالُ لَهُ يَعْقُوبُ وَسَاقَ الْحَدِيثَ بِمَعْنَى حَدِيثِ اللَّيْثِ