'First born' in the Bible

Then she gave birth to her firstborn Son, and she wrapped Him snugly in cloth and laid Him in a feeding trough—because there was no room for them at the lodging place.

(just as it is written in the law of the Lord: Every firstborn male will be dedicated to the Lord)

For those He foreknew He also predestined to be conformed to the image of His Son, so that He would be the firstborn among many brothers.

He is the image of the invisible God,the firstborn over all creation.

He is also the head of the body, the church;He is the beginning,the firstborn from the dead,so that He might come to havefirst place in everything.

When He again brings His firstborn into the world, He says, And all God’s angels must worship Him.

By faith he instituted the Passover and the sprinkling of the blood, so that the destroyer of the firstborn might not touch the Israelites.

to the assembly of the firstborn whose names have been written in heaven, to God who is the Judge of all, to the spirits of righteous people made perfect,

and from Jesus Christ, the faithful witness, the firstborn from the dead and the ruler of the kings of the earth.To Him who loves us and has set us free from our sins by His blood,