4. Mose 3:40

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). The number of the first-born of the twelve tribes amounted to 22,273 of a month old and upwards (Num 3:43). Of this number 22,000 were exchanged for the 22,000 Levites, and the cattle of the Levites were also set against the first-born of the cattle of the tribes of Israel, though without their being numbered and exchanged head for head. In Num 3:44 and Num 3:45 the command of God concerning the adoption of the Levites is repeated, for the purpose of adding the further instructions with regard to the 273, the number by which the first-born of the tribes exceeded those of the Levites. "And as for the redemption of the 273 (lit., the 273 to be redeemed) of the first-born of the children of Israel which were more than the Levites, thou shalt take five shekels a head," etc. This was the general price established by the law for the redemption of the first-born of men (see Num 18:16). On the sacred shekel, see at Exo 30:13. The redemption money for 273 first-born, in all 1365 shekels, was to be paid to Aaron and his sons as compensation for the persons who properly belonged to Jehovah, and had been appointed as first-born for the service of the priests.

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 their coming out of Egypt, when the first-born were sanctified, Exo 13:2. If there were 22,000 first-born males, we may suppose as many females, and all these brought forth in the first year after they came out of Egypt, we must hence infer that in the last year of their servitude, even when it was in the greatest extremity, there were abundance of marriages made among the Israelites; they were not discouraged by the present distress, but married in faith, expecting that God would shortly visit them with mercy, and that their children, though born in bondage, should live in liberty and honour. And it was a token of good to them, an evidence that they were blessed of the Lord, that they were not only kept alive, but greatly increased, in a barren wilderness. 2. The number of the first-born, and that of the Levites, by a special providence, came pretty near to each other; thus, when he divided the nations, he set the bounds of the people according to the number of the children of Israel, Deu 32:8. Known unto God are all his works beforehand, and there is an exact proportion between them, and so it will appear when they come to be compared. The Levites' cattle are said to be taken instead of the firstlings of the cattle of the children of Israel, that is, the Levites, with all their possessions, were devoted to God instead of the first-born and all theirs; for, when we give ourselves to God, all we…

3:40-51 There were 273 more firstborn sons in Israel (in the non-Levite tribes) than there were Levite males (cp. 3:39). Because the Levites served as substitutes for the firstborn of Israel (3:41; see study note on 3:11-13), a redemption price (3:48) of five pieces of silver (3:47) had to be paid for each of the extra firstborn sons (3:46; cp. Lev 27:6). It is not clear who covered this cost. This provision for a special class of substitutes points to Christ’s role as a substitute; through his death, Christ paid the redemption price for all humanity (see Mark 10:45; Gal 3:13; Eph 1:7; Heb 9:15).