[Machine] The Messenger of Allah ﷺ said, "Whoever kills his slave, we will kill him. And whoever mutilates him, we will mutilate him." Then Al-Hasan forgot this Hadith and used to say, "A free man should not be killed for a slave."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «مَنْ قَتَلَ عَبْدَهُ قَتَلْنَاهُ وَمَنْ جَدَعَهُ جَدَعْنَاهُ» قَالَ ثُمَّ نَسِيَ الْحَسَنُ هَذَا الْحَدِيثَ وَكَانَ يَقُولُ لَا يُقْتَلُ حُرٌّ بِعَبْدٍ