Exodus 30:11-16: "And the LORD spoke to Moses, saying, When you take the sum of the children of Israel after their number, then shall they give every man a ransom for his soul to the LORD, when you number them; that there be no plague among them, when you number them. This they shall give, every one that passes among them that are numbered, half a shekel after the shekel of the sanctuary: (a shekel is twenty gerahs:) an half shekel shall be the offering of the LORD. Every one that passes among them that are numbered, from twenty years old and above, shall give an offering to the LORD. The rich shall not give more, and the poor shall not give less than half a shekel, when they give an offering to the LORD, to make an atonement for your souls....