Exodus 30:10-16 AMPC
Aaron shall make atonement upon the horns of it once a year; with the blood of the sin offering of atonement once in the year shall he make atonement upon and for it throughout your generations. It is most holy to the Lord.
And the Lord said to Moses,
When you take the census of the Israelites, every man shall give a ransom for himself to the Lord when you number them, that no plague may fall upon them when you number them. [Rom. 8:1-4.]
This is what everyone shall give as he joins those already numbered: a half shekel, in terms of the sanctuary shekel, a shekel being twenty gerahs; a half shekel as an offering to the Lord.
Everyone from twenty years old and upward, as he joins those already numbered, shall give this offering to the Lord. [Matt. 10:24; I Pet. 1:18, 19.]
The rich shall not give more and the poor shall not give less than half a shekel when [you] give this offering to the Lord to make atonement for yourselves.
And you shall take the atonement money of the Israelites and use it [exclusively] for the service of the Tent of Meeting, that it may bring the Israelites to remembrance before the Lord, to make atonement for yourselves.
AMPC: Amplified Bible, Classic Edition