Musannaf Ibn Abi Shayba 18:653

Abu Bakr narrated to us, he said: Waki' narrated to us, he said: Mughirah ibn Abi al-Hurr narrated to us that a camel attacked a man and killed him. Then a man came and killed the camel. Shurayh nullified the blood money for the man and held the man liable for the price of the camel.