Exodus 13:12 (WEB)
that you shall set apart to the LORD all that opens the womb, and every firstborn that comes from an animal which you have. The males shall be the LORD’s.
Catechism · 1
“The presentation of Jesus in the temple shows him to be the firstborn Son who belongs to the Lord.” — Catechism footnote: Cf. Lk 2:22-39; EX 13:2, 12-13.
