Sayyidina Abu Hurayrah (RA) reported that Allah’s Messenger (SAW), “If an animal wounds anyone or if one falls in a well or a mine and i. wounded or dies then there is no bloodwit (or compensation). And, on buried treasure a fifth is paid”.
[Ahmed7258, Bukhari 802, M1710, Abu Dawud 3085, Nisai 2494, Ibn e Majah 2673]