Sunan Abi Dawud 4583
سنن أبي داود#4583HasanNarrated 'Amr b. Suh'aib: On his father's authority, said that his grandfather reported the Messenger of Allah (ﷺ) said: The blood-wit for a man who makes a covenant is half of the blood-wit for a free man. Abu Dawud said: It has been transmitted by Usamah b. Zaid al-Laithi and 'Abd al-Rahman b. al-Harith on the authority of 'Amr b. Suh'aib in similar manner
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Muhyi Al-Din Abdul HamidHasan
Zubair Ali ZaiHasan
In-book reference: 41:90