Exodus 13:13

13 Every opening the womb of the ass thou shalt change for a sheep; and if thou wilt not change it, thou shalt redeem it: every first-born of man of thy sons shalt thou redeem.

Exodus 13:13 Meaning and Commentary

Exodus 13:13

And every firstling of an ass thou shalt redeem with a lamb,
&c.] Which was given to the priest for it; and according to the Jewish canon F6, it might be redeemed with that only;

``not with a calf, nor with an animal (a goat or a ram, as Bartenora interprets it), nor with a lamb slain, or torn to pieces.''
Jarchi thinks the ass only was to be redeemed, and not the firstling of any other unclean creature, but his reasons are insufficient; all unclean creatures, as horses, camels, dogs, swine are included in it, as should seem from ( Numbers 18:15 ) and this is the rather particularly mentioned, because there was a greater plenty of them than of horses and camels, and because they were very useful creatures; and if these were to be redeemed, then much more those of less value, and less useful. Hence might arise the story and calumny, as some have thought, of the Jews worshipping an ass's head: and if thou wilt not redeem it, then thou shall break its neck;
cut off its head on the back of the neck with a knife or cleaver, such as butchers use, as the Misnah F7, and its commentators, interpret it, so that the owner should have no profit by it: and all the firstborn of man amongst thy children shall thou redeem;
with the price of five shekels of the sanctuary, and within thirty days of the birth of it, ( Numbers 18:16 ) and these being to be redeemed as the unclean beasts were, shows that men are by nature unclean, and even the firstborn, whose names are written in heaven, the elect of God, and need redemption by the blood of the Lamb.
FOOTNOTES:

F6 Misn. Becorot, sect. 1. sect. 5.
F7 lbid. sect. 7. Maimon & Bartenora in ib.

Exodus 13:13 In-Context

11 And it shall come to pass when the Lord thy God shall bring thee into the land of the Chananites, as he sware to thy fathers, and shall give it thee,
12 that thou shalt set apart every opening the womb, the males to the Lord, every one that opens the womb out of the herds or among thy cattle, as many as thou shalt have: thou shalt sanctify the males to the Lord.
13 Every opening the womb of the ass thou shalt change for a sheep; and if thou wilt not change it, thou shalt redeem it: every first-born of man of thy sons shalt thou redeem.
14 And if thy son should ask thee hereafter, saying, What is this? then thou shalt say to him, With a strong hand the Lord brought us out of Egypt, out of the house of bondage.
15 And when Pharao hardened to send us away, he slew every first-born in the land of Egypt, both the first-born of man and the first-born of beast; therefore do I sacrifice every that opens the womb, the males to the Lord, and every first-born of my sons I will redeem.

The Brenton translation of the Septuagint is in the public domain.