And fire came out from before the LORD and consumed them, and they died before the LORD.
Here is, I. The great sin that Nadab and Abihu were guilty of: and a great sin we must call it, how little soever it appears in our eye, because it is evident by the punishment of it that it was highly provoking to the God of heaven, whose judgment, we are sure, is according to truth. But what was their sin?
Commenting on Leviticus 10:1-2
And there went out fire from the Lord,.... They sinned by fire, and they were punished by fire, either from heaven, or from the most holy place, where the Lord dwelt between the cherubim; this was of the nature of lightning, as appears by what follows: and devoured them; not reduced them to ashes, for neither their bodies nor their clothes were burnt with this...
there went out fire from the Lord, and devoured them--rather, "killed them"; for it appears (Lev 10:5) that neither their bodies nor their robes were consumed. The expression, "from the Lord," indicates that this fire issued from the most holy place.