Sunan Abi Dawud 4541

Narrated 'Amr b. Suh'aib: On his father's authority, said that his grandfather reported the Messenger of Allah (ﷺ) gave judgment that if anyone is killed accidentally, his blood-wit should be one hundred camels: thirty she-camels which had entered their second year, thirty she-camels which had entered their third year, thirty she-camels which had entered their fourth year, and ten male camels which had entered their third year