Exodus 30:12

9 Ye shall offer no strange incense thereon, nor burnt-offering, nor meal-offering; and ye shall pour no drink-offering thereon.

10 And Aaron shall make atonement upon the horns of it once in the year; with the blood of the sin-offering of atonement once in the year shall he make atonement for it throughout your generations: it is most holy unto Jehovah.

11 And Jehovah spake unto Moses, saying,

12 When thou takest the sum of the children of Israel, according to those that are numbered of them, then shall they give every man a ransom for his soul unto Jehovah, when thou numberest them; that there be no plague among them, when thou numberest them.

13 This they shall give, every one that passeth over unto them that are numbered, half a shekel after the shekel of the sanctuary; (the shekel is twenty gerahs;) half a shekel for an offering to Jehovah.

14 Every one that passeth over unto them that are numbered, from twenty years old and upward, shall give the offering of Jehovah.

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