7 And she brought forth her first born son and wrapped him up in swaddling clothes and laid him in a manger: because there was no room for them in the inn.
Douay–Rheims · Challoner revision · Luke 2:7
Why this matters
Mary gives birth, wraps Jesus, and lays him in a manger. The scene expresses concrete maternal care in humble circumstances. “Firstborn” is a legal and familial designation and need not imply later children.