Numbers 3:40-45

40The Lord said to Moses, ‘Record all the firstborn sons of the Israelites. Record every male who is one month old or older. Make a list of their names.

41The Israelites' firstborn sons belong to me. I am the Lord. But I will accept all the males among the Levites instead. The Israelites' firstborn animals also belong to me. But I will accept the animals of the Levites instead.’

42So Moses counted all the firstborn males among the Israelites as the Lord had said.

43He counted 22,273 firstborn males who were one month old or older. He made a list of their names.

44Then the Lord said to Moses,

45‘Do not take the firstborn males among the people to belong to me. Accept the Levites instead. Do not use the firstborn animals of the people. Accept the animals of the Levites instead. The Levites will belong to me. I am the Lord.