(7) باب مَنْ قَتَلَ عَبْدَهُ أَوْ مَثَّلَ بِهِ أَيُقَادُ مِنْهُ
It was narrated from Hisham, from Qatadah, from Al-Hasan, who said:
"A free man should not be subjected to retaliation in return for a slave."
Reference: Sunan Abi Dawud 4518
In-book reference: Book 41, Hadith 25
English translation: Book 40, Hadith 4503