Exodus 13:15

15 When Pharaoh was unwilling to let us go, ADONAI killed all the firstborn males in the land of Egypt, both the firstborn of humans and the firstborn of animals. This is why I sacrifice to ADONAI any male that is first from the womb of an animal, but all the firstborn of my sons I redeem.'

Exodus 13:15 Meaning and Commentary

Exodus 13:15

And it came to pass, when Pharaoh would hardly let us go
Showed great reluctance to it, and with difficulty was prevailed upon to dismiss them: that the Lord slew all the firstborn in the land of Egypt, both the
firstborn of men, and the firstborn of beast:
which he did in one night, making use of a destroying angel or angels for that purpose: therefore I sacrifice to the Lord all that openeth thee matrix, being
males;
that is, the firstborn of all clean creatures, as oxen, sheep, and goats: but all the firstborn of my children I redeem;
by paying five shekels apiece to the priest for them, as before observed; and this law continues to be observed with the Jews; the manner of which, as related by Leo Modena F9, is as follows,

``Thirty days being expired after the birth of the child, they call a priest to them; that is to say, one that is descended of the stock of Aaron, whom the father of the child pleaseth; and so, many people being gathered together at the time appointed, the father of the child bringeth before the priest, in a bowl or basin, a good quantity of gold and silver, and then they give him the child into his arms; the priest then calling the mother of it before him, saith unto her, mistress, is this your son? she answereth, yes; then, replies he, have you never had any child before, either male or female, or have miscarried anyone? she saith unto him, no; then doth the priest say, this child is mine, as being the firstborn; then turning himself toward the father, he asketh him, whether he will redeem it or not? who answereth him, saying, see, here is gold and silver, take your own price; then saith the priest unto him, you will redeem it then? the father answereth, I will redeem it; it shall be so then, saith the priest, this child is mine as being the firstborn, as it is written, ( Numbers 18:16 ) . I therefore take this in exchange and so he takes the sum of two French crowns, or thereabout, as he thinks good, and then delivers the child to his father and mother, and this day they make a feasting day.''
This custom was used in Christ's time, and was observed with respect to him, ( Luke 2:27 ) .
FOOTNOTES:

F9 History of the Jews, par. 4. c. 9. sect. 2.

Exodus 13:15 In-Context

13 Every firstborn from a donkey, you are to redeem with a lamb; but if you choose not to redeem it, you must break its neck. But from people, you are to redeem every firstborn son.
14 When, at some future time, your son asks you, 'What is this?' then say to him, 'With a strong hand ADONAI brought us out of Egypt, out of the abode of slavery.
15 When Pharaoh was unwilling to let us go, ADONAI killed all the firstborn males in the land of Egypt, both the firstborn of humans and the firstborn of animals. This is why I sacrifice to ADONAI any male that is first from the womb of an animal, but all the firstborn of my sons I redeem.'
16 This will serve as a sign on your hand and at the front of a headband around your forehead that with a strong hand ADONAI brought us out of Egypt."
17 After Pharaoh had let the people go, God did not guide them to the highway that goes through the land of the P'lishtim, because it was close by -God thought that the people, upon seeing war, might change their minds and return to Egypt.
Complete Jewish Bible Copyright 1998 by David H. Stern. Published by Jewish New Testament Publications, Inc. All rights reserved. Used by permission.