'Half shekel' in the Bible

This, shall they give - every one that passeth over to them that have been numbered - a half-shekel by the shekel of the sanctuary, - the shekel is twenty gerahs - the half-shekel, shalt be a heave-offering to Yahweh.

The rich, shall not give more, and the poor, shall not give less, than the half-shekel, - when they give the heave-offering of Yahweh, to put a propitiatory-covering over your souls.

a bekah per head, that is a half shekel, by the shekel of the sanctuary, for all that passed over to them who had been numbered, from twenty years old and upwards, for six hundred and three thousand, and five hundred and fifty.