Abu Dawud Book 34, Hadith Number 4529.
Chapter : The amount of bloodwit.
Narated By Abdullah ibn Mas’ud : The Prophet (PBUH) said: The blood-wit for accidental killing should be twenty she-camels which had entered their fourth year, twenty she-camels which had entered their fifth year, twenty she-camels which had entered their second year, twenty she-camels which had entered their third year, and twenty male camels which had entered their second year. It does not beyond Ibn Mas’ud.