Numbers 3:43-45

Young's Literal Translation

⁴³ And all the first-born -- male -- by the number of names, from a son of a month and upward, of their numbered ones, are two and twenty thousand two hundred and seventy and three.

⁴⁴ And Jehovah speaketh unto Moses, saying,

⁴⁵ `Take the Levites instead of every first-born among the sons of Israel, and the cattle of the Levites instead of their cattle; and the Levites have been Mine; I [am] Jehovah.