'High Priest' in the Bible

The assembly is to protect the one who kills someone from the hand of the avenger of blood. Then the assembly will return him to the city of refuge he fled to, and he must live there until the death of the high priest who was anointed with the holy oil.

for the one who killed a person was supposed to live in his city of refuge until the death of the high priest. Only after the death of the high priest may the one who has killed a person return to the land he possesses.