"Whoever kills his slave, we will kill him: whoever mutilates (his slave). We will mutilate him, and whoever castrates (his slave), we will castrate him." (Using translation from Nasāʾī 4736)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ قَتَلَ عَبْدَهُ قَتَلْنَاهُ وَمَنْ جَدَعَهُ جَدَعْنَاهُ وَمَنْ أَخْصَاهُ أَخْصَيْنَاهُ»