Exodus 30:15 in the King James Version
The rich shall not give more, and the poor shall not give less than half a shekel, when they give an offering unto the LORD, to make an atonement for your souls.
Context
14 Everyone who passes over to those who are counted, from twenty years old and upward, shall give the offering to the LORD.
15 The rich shall not give more, and the poor shall not give less, than the half shekel, when they give the offering of the LORD, to make atonement for your souls.
16 You shall take the atonement money from the children of Israel, and shall appoint it for the service of the Tent of Meeting; that it may be a memorial for the children of Israel before the LORD, to make atonement for your souls.”