Numbers 3:51

Overview - Numbers 3
1	The sons of Aaron.
5	The Levites are given to the priests instead of the first-born;
14	are numbered by their families.
21	The families, number, and charge of the Gershonites;
27	of the Kohathites;
33	of the Merarites.
38	The place and charge of Moses and Aaron.
40	The first-born are freed by the Levites.
44	The overplus are redeemed.

Numbers 3:51  (King James Version)
And Moses gave the money of them that were redeemed unto Aaron and to his sons, according to the word of the LORD, as the LORD commanded Moses.