Numbers 3:43-45

New King James Version

⁴³ And all the firstborn males, according to the number of names from a month old and above, of those who were numbered of them, were twenty-two thousand two hundred and seventy-three.

⁴⁴ Then the Lord spoke to Moses, saying: ^45 (A)“Take the Levites instead of all the firstborn among the children of Israel, and the livestock of the Levites instead of their livestock. The Levites shall be Mine: I am the Lord.