Exodus 30:12

9 You shall offer no strange incense on it, nor burnt offering, nor meal-offering; and you shall pour no drink-offering on it.

10 Aaron shall make atonement on its horns once in the year; with the blood of the sin offering of atonement once in the year he shall make atonement for it throughout your generations. It is most holy to Yahweh."

11 Yahweh spoke to Moses, saying,

12 "When you take a census of the children of Israel, according to those who are numbered among them, then each man shall give a ransom for his soul to Yahweh, when you number them; that there be no plague among them when you number them.

13 They shall give this, everyone who passes over to those who are numbered, half a shekel after the shekel of the sanctuary; (the shekel is twenty gerahs;) half a shekel for an offering to Yahweh.

14 Everyone who passes over to those who are numbered, from twenty years old and upward, shall give the offering to Yahweh.

15 The rich shall not give more, and the poor shall not give less, than the half shekel, when they give the offering of Yahweh, to make atonement for your souls.