Abu Dawud Book 34, Hadith Number 4526.

Narated By Abdullah ibn Amr ibn al-‘As : The Apostle of Allah (PBUH) 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.