'First born' in the Bible

And say thou to Pharaoh, So said Jehovah, my first-born son is Israel.

And saying to thee, Send forth my son, and he shall save me: and shalt thou refuse to send him, behold me killing thy son, thy first-born.

These the heads of the house of their father: the sons of Reuben the first-born of Israel: Hanoch and Pallu, Hezron and Carmi: these the tribes of Reuben.

And every first-born in the land of Egypt shall die, from the first-born of Pharaoh sitting upon his throne, even to the first-born of the maid which is behind the two mill-stones; and every first-born of quadruped.

And I passed over in the land of Egypt in this night, and I struck every first-born in the land of Egypt from man even to quadruped: and against all the gods of Egypt I will do judgments: I Jehovah.

And it will be in the middle of the night, and Jehovah struck every firstborn in the land of Egypt, from the first-born of Pharaoh sitting upon his throne, to the first-born of the captive which is in the house of the pit; and every first-born of the cattle.

Consecrate to me every first-born bursting open every womb among the sons of Israel, of man and of cattle: it is to me.

And every first-born of the ass, thou shalt redeem with a sheep; and if thou shalt not redeem, thou shalt break his neck: and every first-born of man among thy sons thou shalt redeem.

And it shall be when Pharaoh was hard to send us forth, and Jehovah will kill every first-born in the land of Egypt, from the first-born of man to the firstborn of cattle; for this I sacrifice to Jehovah all bursting forth the womb, the males; and all the first-born of my sons I will redeem.

Thy fulness and thy tears thou shalt not delay: the first-born of thy sons thou shalt give to me.

And the first-born of the ass thou shalt redeem with a sheep: and if thou shalt not ransom, thou shalt break his neck. Every first-born of thy sons thou. shalt ransom, and he shall not be seen before me empty.