that the Messenger of Allah ﷺ said: "Whoever kills his slave, then we will kill him, and whoever maims his slave, then we will maim him."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ قَتَلَ عَبْدَهُ قَتَلْنَاهُ وَمَنْ جَدَعَ عَبْدَهُ جَدَعْنَاهُ