# Then they offered unapproved fire before Yahweh, which he had not commanded them to offer
"But Yahweh did not approve of their offering because it was not according to what he commanded them to offer"
# unapproved fire before Yahweh
"unapproved fire to Yahweh"
# So fire came out from before Yahweh
"So Yahweh sent a fire"
# came out from before Yahweh
"came out from Yahweh"
# devoured them
The fire completely burning the men up is spoken of as if the fire devoured or completely used them up. (See: [[rc://en/ta/man/translate/figs-metaphor]])