Exodus 30:13

American Standard Version (ASV):
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.

King James Version (KJV):
This they shall give, every one that passeth 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.