Numbers 3:39

36 And the oversight -- the charge of the sons of Merari -- [is] the boards of the tabernacle, and its bars, and its pillars, and its sockets, and all its vessels, and all its service,

37 and the pillars of the court round about, and their sockets, and their pins, and their cords.

38 And those encamping before the tabernacle eastward, before the tent of meeting, at the east, [are] Moses and Aaron, and his sons, keeping the charge of the sanctuary for the charge of the sons of Israel, and the stranger who cometh near is put to death.

39 All those numbered of the Levites whom Moses numbered -- Aaron also -- by the command of Jehovah, by their families, every male from a son of a month and upward, [are] two and twenty thousand.

40 And Jehovah saith unto Moses, `Number every first-born male of the sons of Israel from a son of a month and upward, and take up the number of their names;

41 and thou hast taken the Levites for Me (I [am] Jehovah), instead of every first-born among the sons of Israel, and the cattle of the Levites instead of every firstling among the cattle of the sons of Israel.`

42 And Moses numbereth, as Jehovah hath commanded him, all the first-born among the sons of Israel.