Exodus 30:15 in the World English Bible
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.
Context
14 Every one that passeth among them that are numbered, from twenty years old and above, shall give an offering unto the LORD.
15 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.
16 And thou shalt take the atonement money of the children of Israel, and shalt appoint it for the service of the tabernacle of the congregation; that it may be a memorial unto the children of Israel before the LORD, to make an atonement for your souls.