Exodus 30:13-15

13Each one who is numbered in the census shall give this: half a shekel
A  shekel was about 2/5 ounce or 11 grams
according to the bshekel of the sanctuary (the cshekel is twenty gerahs),
A  gerah was about 1/50 ounce or 0.6 gram
ehalf a shekel as an offering to the Lord.
14Everyone who is numbered in the census, from twenty years old and upward, shall give the Lord’s offering. 15The rich shall not give more, and the poor shall not give less, than fthe half shekel, when you give the Lord’s offering to make atonement for your lives.
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