Exodus 21:30; Exodus 30:12

30 If there be laid on him a sum of money, then he shall give for the ransom of his life whatsoever is laid upon him.

12 When thou takest the sum of the children of Israel after their number, then shall they give every man a ransom for his soul unto the LORD, when thou numberest them; that there be no plague among them, when thou numberest them.