And thou shalt give the money, wherewith the odd number of them is to be redeemed, unto Aaron and to his sons.
Here is the exchange made of the Levites for the first-born. 1. The first-born were numbered from a month old, Num 3:42, Num 3:43. Those certainly were not reckoned who, though first-born, had become heads of families themselves, but those only that were under age; and the learned bishop Patrick is decidedly of opinion that none were numbered but those only that were born since...
Commenting on Numbers 3:40-51
And Moses took the redemption money,.... Of five shekels per head: of them that were over and above redeemed by the Levites; or were more than those redeemed by them. A Levite redeemed a firstborn, or freed him from the redemption price, being taken in lieu of him: 22,000 Levites were answerable to 22,000 firstborn of Israel; but as there were no more Levites than...
Num 3:40-48 After this, Moses numbered the first-born of the children of Israel, to exchange them for the Levites according to the command of God, which is repeated in Num 3:41 and Num 3:44-45 from Num 3:11-13, and to adopt the latter in their stead for the service at the sanctuary (on Num 3:41 and Num 3:45, cf. Num 3:11-13).
Commenting on Numbers 3:40-48