Exodus 30:14 in the King James Version
Every one that passeth among them that are numbered, from twenty years old and above, shall give an offering unto the LORD.
Context
13 They shall give this, everyone who passes over to those who are counted, half a shekel according to the shekel of the sanctuary (the shekel is twenty gerahs); half a shekel for an offering to the LORD.
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.