Exodus 30:11-13

American Standard Version

¹¹ And Jehovah spake unto Moses, saying, ¹² When thou takest the sum of the children of Israel, according to those that are numbered of them, then shall they give every man a ransom for his soul unto Jehovah, when thou numberest them; that there be no plague among them, when thou numberest them. ¹³ This they shall give, every one that passeth over unto them that are numbered: half a shekel after the shekel of the sanctuary (the shekel is twenty gerahs), half a shekel for an offering to Jehovah.