Numbers 3:38-48

38 And those who encamped before the tabernacle eastward, before the tent of meeting toward the sunrising, were Moses, and Aaron and his sons, who kept the charge of the sanctuary for the charge of the children of Israel; and the stranger that cometh near shall be put to death.
39 All that were numbered of the Levites, whom Moses and Aaron numbered at the commandment of Jehovah, according to their families, all the males from a month old and upward, were twenty-two thousand.
40 And Jehovah said to Moses, Number all the first-born males of the children of Israel from a month old and upward, and take the number of their names.
41 And thou shalt take the Levites for me (I am Jehovah) instead of all the firstborn among the children of Israel; and the cattle of the Levites, instead of all the firstlings among the cattle of the children of Israel.
42 And Moses numbered, as Jehovah had commanded him, all the firstborn among the children of Israel.
43 And all the firstborn males, by the number of the names, from a month old and upward, according to their numbering, were twenty-two thousand two hundred and seventy-three.
44 And Jehovah spoke to Moses, saying,
45 Take the Levites instead of all the firstborn among the children of Israel, and the cattle of the Levites instead of their cattle; and the Levites shall be mine: I am Jehovah.
46 And for those that are to be ransomed, the two hundred and seventy-three of the firstborn of the children of Israel, which are in excess over the Levites,
47 thou shalt take five shekels apiece by the poll, according to the shekel of the sanctuary shalt thou take them, -- twenty gerahs the shekel;
48 and thou shalt give the money unto Aaron and unto his sons for those in excess among them who are to be ransomed.
The Darby Translation is in the public domain.