Exodus 30:13-15

New Century Version

¹³ Every person who is counted must pay one-fifth of an ounce of silver. (This is set by using one-half of the Holy Place measure, which weighs two-fifths of an ounce.) This amount is a gift to the Lord. ¹⁴ Every person who is counted and is twenty years old or older must give this amount to the Lord. ¹⁵ A rich person must not give more than one-fifth of an ounce, and a poor person must not give less. You are paying this to the Lord to buy back your lives.