(7) باب مَنْ قَتَلَ عَبْدَهُ أَوْ مَثَّلَ بِهِ أَيُقَادُ مِنْهُ
Qatadah transmitted the tradition mentioned above through a chain of narrators like that of Shu'bah. This version adds:
Then al-Hasan forgot this tradition, and he used to say: A free man is not to be killed for a slave. (ID)
Reference (ID): Sunan Abi Dawud 4517 (ID)
In-book reference (ID): Book 41, Hadith 24 (ID)
English translation (ID): Book 40, Hadith 4503 (ID)