English Standard Version
Chapter 3 39
All those listed among the Levites, whom Moses and Aaron listed at the commandment of the LORD, by clans, all the males from a month old and upward, were 22,000. 40
And the LORD said to Moses, “List all the firstborn males of the people of Israel, from a month old and upward, taking the number of their names. 41
And you shall take the Levites for me—I am the LORD—instead of all the firstborn among the people of Israel, and the cattle of the Levites instead of all the firstborn among the cattle of the people of Israel.” 42
So Moses listed all the firstborn among the people of Israel, as the LORD commanded him.