Abdullah ibn Amr reported: Zinba’ Abi Rawh found his servant boy with a servant girl, so he maimed his nose and castrated him. The Prophet, peace and blessings be upon him, came afterward, and he said, “Who did this to you?” The boy said, “Zinba’.” The Prophet summoned Zinba’, and he said, “What made you do this?” Zinba’ said, “He was misbehaving in such a way.” The Prophet told the slave, “Go, for you are free.” Zinba’ said, “Am I not his guardian?” The Prophet said, “His guardian is Allah and His Messenger.”
Source: Musnad Aḥmad 6710
Grade: Sahih (authentic) according to Ahmad Shakir
عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِي أَنَّ زِنْبَاعًا أَبَا رَوْحٍ وَجَدَ غُلَامًا لَهُ مَعَ جَارِيَةٍ لَهُ فَجَدَعَ أَنْفَهُ وَجَبَّهُ فَأَتَى النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ مَنْ فَعَلَ هَذَا بِكَ قَالَ زِنْبَاعٌ فَدَعَاهُ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ مَا حَمَلَكَ عَلَى هَذَا فَقَالَ كَانَ مِنْ أَمْرِهِ كَذَا وَكَذَا فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لِلْعَبْدِ اذْهَبْ فَأَنْتَ حُرٌّ فَقَالَ يَا رَسُولَ اللَّهِ فَمَوْلَى مَنْ أَنَا قَالَ مَوْلَى اللَّهِ وَرَسُولِهِ
6710 مسند أحمد بن حنبل
6/256 المحدث أحمد شاكر خلاصة حكم المحدث إسناده صحيح في مسند أحمد