Shemot 13:12

12 That thou shalt set apart unto Hashem all that openeth the rechem (womb), and every firstling that is born of a behemah which thou hast; hazecharim (the males) shall be Hashem’s.

Shemot 13:12 Meaning and Commentary

Exodus 13:12

That thou shalt set apart unto the Lord all that openeth the
matrix
Or "the womb", as in ( Exodus 13:2 ) , and this phrase, "set apart", explains the word "sanctify" there, and shows that it signifies the separating of such to the use and service of God, causing it to "pass", as the word ^F4 here used signifies, from a man's own power and use, to be the Lord's only: and every firstling that cometh from a beast which thou hast;
or "even every firstling" ^F5, explaining what is meant by what opens the matrix or womb, even every firstborn of a beast; though Jarchi interprets it of an abortion, what comes before its time, that this also should be set apart to the Lord; this must be understood of the firstlings of clean creatures, fit for food and sacrifice, such as the firstlings of cows, sheep, and goats, ( Numbers 18:17 ) as distinguished from unclean ones in the following verse: the males [shall be] the Lord's;
which explains what sort of firstborn of man and beast were to be set apart for his use, not females, though the first that opened the womb; but males.

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FOOTNOTES:

F4 (trbehw) "et transire facies", Pagninus, Montanus, Fagius, Vatablus, Drusius, Cartwright; so Ainsworth.
F5 (rjp lkw) "etiam quicunque vel quicquid aperuerit", Junius & Tremellius, Piscator, Ainsworth.

Shemot 13:12 In-Context

10 Thou shalt therefore be shomer over this chukkah in its mo’ed (season, fixed time) perpetually.

11 And it shall be when Hashem shall bring thee into the land of the Kena’ani, as He swore unto thee and to thy avot, and shall give it thee,

12 That thou shalt set apart unto Hashem all that openeth the rechem (womb), and every firstling that is born of a behemah which thou hast; hazecharim (the males) shall be Hashem’s.

13 And every firstling of a he-donkey thou shalt redeem with a seh; and if thou wilt not redeem it, then thou shalt break its neck; and kol bechor adam among thy banim shalt thou redeem.

14 And it shall be when thy ben asketh thee in time to come, saying, Mah zot? (What is this?) that thou shalt say unto him, By chozek yad Hashem brought us out from Mitzrayim, from the bais avadim;