Exodus 12:29 - 30 - It happened at midnight, that Yahweh struck all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the dungeon; and all the firstborn of livestock. Pharaoh rose up in the night, he, and all his servants, and all the Egyptians; and there was a great cry in Egypt, for there was not a house where there was not one dead.
2 Chronicles 21:3 - Their father gave them great gifts, of silver, and of gold, and of precious things, with fortified cities in Judah: but the kingdom gave he to Jehoram, because he was the firstborn.
Numbers 3:50 - from the firstborn of the children of Israel he took the money, one thousand three hundred sixty-five shekels, after the shekel of the sanctuary:
Numbers 3:46 - For the redemption of the two hundred seventy-three of the firstborn of the children of Israel, who exceed the number of the Levites,
Numbers 3:41 - 42 - You shall take the Levites for me (I am Yahweh) instead of all the firstborn among the children of Israel; and the livestock of the Levites instead of all the firstborn among the livestock of the children of Israel." Moses numbered, as Yahweh commanded him, all the firstborn among the children of Israel.