'First born' in the Bible

And she brought forth a son, her first-born, and wrapped him in swaddling-clothes, and laid him in a manger, because there was no room for them in the inn.

By faith he kept the passover, and the sprinkling of the blood, that the destroyer of the first-born might not touch them.

and to the general assembly and church of the first-born registered in the heavens, and to God the judge of all, and to the spirits of just men perfected,

and from Jesus Christ, the faithful witness, and first-born from the dead, and the prince of the kings of the earth: to him who loved us, and washed us from our sins by his blood,