NT-GOSPEL.filter - nkjv firstborn:

nkjv@Matthew:1:25 @ and did not know her till she had brought forth her firstborn Son. And he called His name JESUS.

nkjv@Luke:2:7 @ And she brought forth her firstborn Son, and wrapped Him in swaddling cloths, and laid Him in a manger, because there was no room for them in the inn.