Then he said to Moses, "Come up to YHWH, you and Aaron, Nadab, and Abihu, and seventy of the elders of Israel, and worship from afar."
#exodus 24:1 #mishpatim

Nadab and Abihu were ordained by God, but it wasn't enough for them. God knew their character and all that was in their hearts, so he chose them as an object lesson in pride for the rest of the world. See Leviticus 10 for the other half of the story.