'First born' in the Bible

But speaking of the time when He once more brings His Firstborn into the world, He says, "And let all God's angels worship Him."

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

to the great festal gathering and Church of the first-born, whose names are recorded in Heaven, and to a Judge who is God of all, and to the spirits of righteous men made perfect,