Luke 2:23

καθὼς γέγραπται ἐν νόμῳ Κυρίου ὅτι Πᾶν ἄρσεν διανοῖγον μήτραν ἅγιον τῷ Κυρίῳ κληθήσεται—

RBT Greek Interlinear:

Strongs 2531; kathōs; καθὼς; just as; Adv

Strongs 1125; gegraptai; γέγραπται; are written/drawn; V-RIM/P-3S

Strongs 1722; en; ἐν; within; Prep

Strongs 3551; nomō; νόμῳ; custom/usage; N-DMS

Strongs 2962; Kyriou; Κυρίου; Master; N-GMS

Strongs 3754; hoti; ὅτι; that; Conj

Strongs 3956; Pan; Πᾶν; all; Adj-NNS

Strongs 730; arsen; ἄρσεν; male; N-NNS

Strongs 1272; dianoigon; διανοῖγον; the act of opening; V-PPA-NNS

Strongs 3388; mētran; μήτραν; a womb; N-AFS

Strongs 40; hagion; ἅγιον; Holy one; Adj-NNS

Strongs 3588; tō; τῷ; the; Art-DMS

Strongs 2962; Kyriō; Κυρίῳ; Master; N-DMS

Strongs 2564; klēthēsetai; κληθήσεται; will be summoned; V-FIP-3S

RBT Hebrew Literal:

just like it has been written/drawn within the usage of a master that every male, he who is opening across a womb,⁶ he will be summoned, a holy one to the Master.

διανοίγω - abrir separando, open apart

"He is holy to myself, every firstborn who opens apart [פטר כל רחם] every womb, within the sons of God Contends ("Israel"), within the Man and within the Beast, himself is mine.

Julia Smith Literal 1876 Translation:
(As has been written in the law of the Lord, That every male opening the womb shall be called holy to the Lord;)

LITV Translation:
as it has been written in the Law of the Lord: Every male opening a womb shall be called holy to the Lord; Ex. 13:2

ESV Translation:
(as it is written in the Law of the Lord, “Every male who first opens the womb shall be called holy to the Lord”)

Footnotes

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The Greek διανοίγω (to open thoroughly/through) carries the sense of opening across or through,

"1. Transitive: to open, especially to open by separating parts of the body, as in τὸ στόμα (the mouth), Hippocrates, Mul. 2.127."

(cf. LSJ, DGE, Bailly)

It implies the separation of two sides to create a passage or gap. This is reflected in its use in contexts like opening doors, the mouth, or eyes, as well as in more figurative uses, such as revealing or explaining knowledge. The idea centers around the concept of parting or separating something to allow access or understanding, whether physically (e.g., opening a door) or intellectually (e.g., revealing hidden meaning).

This concept aligns with the Hebrew noun פטר (Strong's #6363), which refers to that which separates or first opens, and its verb root פטר (Strong's #6362)meaning to cleave or burst through. The Hebrew פתר is often used in the construct form פתר רחם "opening up the womb" or in apposition with בכור (firstborn), signifying the separation that occurs with the birth of the firstborn, the firstborn of both man or beast, emphasizing the "opening" of the womb as a literal and symbolic separation. See

• Ezekiel 20:26
• Exodus 13:12, 15
• Exodus 34:19
• Numbers 18:15

Here also the Greek μήτρα "matrix, womb, origin, source" is used as opposed to "the Belly, Stomach"