'First born' in the Bible

And again, when he brings his firstborn into the world, he says, "Let all God's angels worship him."

By faith he established the Passover and the sprinkling of blood to keep the destroyer of the firstborn from touching the people.

to the assembly of the firstborn who are enrolled in heaven, to a judge who is the God of all, to the spirits of righteous people who have been made perfect,