'First born' in the Bible

Who struck the firstborn of Egypt, both of man and animal;

To him who struck down the Egyptian firstborn; for his loving kindness endures forever;

The firstborn of the poor will eat, and the needy will lie down in safety; and I will kill your root with famine, and your remnant will be killed.

They shall come with weeping; and with petitions will I lead them: I will cause them to walk by rivers of waters, in a straight way in which they shall not stumble; for I am a father to Israel, and Ephraim is my firstborn.'"

Will the LORD be pleased with thousands of rams? With tens of thousands of rivers of oil? Shall I give my firstborn for my disobedience? The fruit of my body for the sin of my soul?

I will pour on the house of David, and on the inhabitants of Jerusalem, the spirit of grace and of supplication; and they will look to me whom they have pierced; and they shall mourn for him, as one mourns for his only son, and will grieve bitterly for him, as one grieves for his firstborn.

She brought forth her firstborn son, and she wrapped him in bands of cloth, and placed him in a feeding trough, because there was no room for them in the inn.

For whom he foreknew, he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers.

He is the head of the body, the church, who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.

Again, when he brings in the firstborn into the world he says, "Let all the angels of God worship him."

By faith, he kept the Passover, and the sprinkling of the blood, that the destroyer of the firstborn should not touch them.

to the assembly of the firstborn who are enrolled in heaven, to God the Judge of all, to the spirits of just men made perfect,

and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us, and freed us from our sins by his blood;