Bible Verses About Weights: Shekel

Everyone subject to the census is to pay as an offering to ADONAI half a shekel [one-fifth of an ounce of silver]- by the standard of the sanctuary shekel (a shekel equals twenty gerahs).

Also the shekel is to be twenty gerahs; your maneh will be the sum of a twenty-shekel piece, a twenty-five-shekel piece and a fifteen-shekel piece.