What does this commandment require?

Exodus 13:13 and Numbers 18:15–16: every firstborn son must be redeemed from sanctuary service with a payment of five shekels of silver, given to a kohen, about a month after birth — distinguishing a human firstborn, who can only be redeemed, from an unclean animal’s firstborn, which could be substituted or destroyed.

Why does this commandment exist?

It traces back to the night of the Exodus, when the LORD struck every firstborn in Egypt and spared Israel’s. In response, He laid a permanent claim on Israel’s own firstborn — “sanctify unto me all the firstborn…it is mine” (Exodus 13:2) — a claim this commandment allows every family to fulfill through redemption rather than service.

Why don’t firstborn sons actually serve at the sanctuary today?

Numbers 3:12 records that the LORD took the tribe of Levi “instead of all the firstborn” to serve in their place. The five-shekel redemption payment formally completes that substitution for every other firstborn son.

How does this commandment connect to the story of Jesus’ infancy?

Luke 2:22–24 records that Joseph and Mary brought their newborn son to Jerusalem to fulfill exactly this law — quoting its language almost word for word (“every male that openeth the womb shall be called holy to the Lord”) and bringing the customary offering, just as any family in Israel would have done.

What does Reuben’s story have to do with this commandment?

Genesis 49:3–4 records Jacob naming Reuben “my firstborn, my might” and then, in the same blessing, stripping him of his birthright. His story is a vivid reminder that the honor this commandment assigns to firstborn status was never something a person could take for granted simply by being born first.

Commandment #101 · Positive · Temple & Worship

Redeem Every Firstborn Son With Five Shekels

פִּדְיוֹן הַבֵּן

Source: Exodus 13:13 · Maimonides, Sefer HaMitzvot, Positive #101

This commandment begins on the most overwhelming night in Israel’s history and ends, generations later, as a brief and almost unremarkable transaction — five shekels, a kohen, a son who belonged, from his very first month, to someone other than his parents alone.

וְכָל פֶּטֶר חֲמֹר תִּפְדֶּה בְשֶׂה וְאִם לֹא תִפְדֶּה וַעֲרַפְתּוֹ וְכֹל בְּכוֹר אָדָם בְּבָנֶיךָ תִּפְדֶּה

"And every firstling of an ass thou shalt redeem with a lamb; and if thou wilt not redeem it, then thou shalt break his neck: and all the firstborn of man among thy children shalt thou redeem."

Exodus 13:13 — Open in Torah Reader

A Claim Laid Down on the Night Egypt Lost Its Firstborn

This commandment is rooted in the single most overwhelming night of Israel’s national life. In the same chapter that records Israel’s escape from Egypt, the LORD lays a permanent claim on what the exodus had just made unmistakably His: “Sanctify unto me all the firstborn, whatsoever openeth the womb among the children of Israel, both of man and of beast: it is mine” (Exodus 13:2). The verse that follows draws the line precisely — an unclean animal’s firstborn, like a donkey’s, could be redeemed with a lamb or have its neck broken; but “all the firstborn of man among thy children shalt thou redeem” (Exodus 13:13). A son could never simply be set aside or substituted away — only redeemed, bought back, at a price that acknowledged precisely whose he had always been.

From a Nation’s Firstborn to a Single Coin at the Sanctuary

By the time this commandment reaches its developed form a generation later, its scale has narrowed in a striking way. The firstborn of Israel no longer serve at the sanctuary themselves — that role has passed to an entire tribe set apart in their place: “I have taken the Levites from among the children of Israel instead of all the firstborn that openeth the matrix among the children of Israel: therefore the Levites shall be mine” (Numbers 3:12). What remains for every other family is something almost startlingly modest:

וּפְדוּיָו מִבֶּן חֹדֶשׁ תִּפְדֶּה בְּעֶרְכְּךָ כֶּסֶף חֲמֵשֶׁת שְׁקָלִים בְּשֶׁקֶל הַקֹּדֶשׁ עֶשְׂרִים גֵּרָה הוּא

"And those that are to be redeemed from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, after the shekel of the sanctuary, which is twenty gerahs."

Numbers 18:16 — Open in Torah Reader

A claim that began with the staggering scale of a nation’s deliverance narrows, a generation later, into a brief transaction at a counter — five small coins, paid to a kohen, a month after a birth. Yet nothing about its weight has changed; only its visible size.

An Ordinary Family Keeping an Extraordinary Law

Centuries later, Luke records an ordinary Judean family doing exactly what this commandment asked of every family before them. About a month after a birth that would, in time, reorder the world, Joseph and Mary brought their son to Jerusalem to present him to the Lord, doing for him “as it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord” — language lifted almost word for word from Exodus 13’s own claim on the firstborn. No fanfare, no exception, no special arrangement for a child the text has already called the Son of the Most High: only the same five shekels, the same kohen, the same brief ritual every family in Israel performed. The law that bound an ordinary household bound this one too — and the son it redeemed would, in the end, become the redemption every redeemed firstborn before him had quietly pointed toward.

Key Figures

Reuben — The Firstborn Who Lost What His Birth Had Promised

Jacob’s final blessing opens by naming Reuben “my firstborn, my might, and the beginning of my strength” — and in the same breath strips him of the place his birth order should have guaranteed (Genesis 49:3; Genesis 49:4), a vivid reminder that the honor this commandment assigns to firstborn status was never something a person could simply secure by being born first.

Israel — The Nation God Called “My Firstborn Son”

Long before a single Israelite child was redeemed at a sanctuary counter, God had already named the whole nation what this commandment names every individual son: “Israel is my son, even my firstborn” (Exodus 4:22). The small, private ritual every family kept around its own table mirrored, in miniature, a claim God had already staked on the people as a whole.

Study Questions

For reflection and group study

This commandment traces back to the night the LORD struck Egypt’s firstborn and spared Israel’s — “sanctify unto me all the firstborn…it is mine.” What does it mean for a law that touches every family, generation after generation, to be rooted in a single unrepeatable night centuries in the past?

See Ex 13:1–2,13–15

An unclean animal’s firstborn could be redeemed with a substitute or have its neck broken — but a human firstborn could only ever be redeemed. What does that distinction reveal about how this commandment understands the difference between property and a person?

See Ex 13:13; 22:29–30

By the time Numbers reaches its developed form, an overwhelming national claim has narrowed into a small, fixed payment — five shekels, to a kohen, a month after birth. What does it mean that something this weighty could be carried, generation after generation, in something this modest and routine?

See Num 3:12–13; 18:15–16

Luke specifically notes that Joseph and Mary did for their son exactly what “is written in the law of the Lord” — no exception, no special treatment, despite who this particular firstborn was. What does it suggest that the law’s most extraordinary fulfillment looked, on the outside, completely ordinary?

See Luke 2:22–24,39

Jacob calls Reuben “my firstborn, my might” and then, in the same breath, declares that he will not excel — his birthright lost to his own actions. How does Reuben’s story complicate any assumption that the honor this commandment assigns to firstborn status was ever simply automatic?

See Gen 49:3–4; 1 Chr 5:1–2

Read this commandment in the original Hebrew.

Open Exodus 13:13 in Torah Reader

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