Numbers 21:3

The Lord hearkened to the voice of Israel - The whole of this verse appears to me to have been added after the days of Joshua. It is certain the Canaanites were not utterly destroyed at the time here spoken of, for this did not take place till after the death of Moses. If, instead of utterly destroyed them, ויחרם vaiyacharem, we translate they devoted them to utter destruction, it will make a good sense, and not repugnant to the Hebrew; though some think it more probable that the verse was added afterwards by Joshua or Ezra, in testimony of the fulfillment of God's promise; for Arad, who is mentioned as being destroyed here, is mentioned among those destroyed by Joshua long after, (see Joshua 12:14): but this is quite consistent with their being devoted to destruction, as this might be fulfilled any time after. See the note on Leviticus 27 (note).

He called the name of the place - Render it as: "the name of the place was called." The transitive verb here is, by a common Hebrew idiom, equivalent to an impersonal one.

Hormah - i. e. "Ban." See Numbers 14:45 and note. In Judges 1:17, we read that the men of Judah and Simeon "slew the Canaanites that inhabited Zephath, and utterly destroyed it;" and further, that "the name of the city was called Hormah." But it does not follow that the name "Hormah" was first bestowed in consequence of the destruction of the place in the time of the Judges, and that in Numbers its occurrence is a sign of a post-Mosaic date of composition. The text here informs us that this aggression of the king of Arad was repelled, and avenged by the capture and sack of his cities; and that the Israelites "banned" them (compare Leviticus 27:28-29). But it was not the plan of the Israelites in the time of Moses to remain in this district. They therefore marched away southeastward; and no doubt for the time the Canaanites resumed possession, and restored the ancient name (Zephath). But Joshua again conquered the king of this district, and finally in the time of the early Judges the ban of Moses and his contemporaries was fully executed. We have therefore in the passage before us the history of the actual origin of the name "Hormah."

21:3 They utterly destroyed them - Neither Moses nor the whole body of the people did this but a select number sent out to punish that king and people, who were so fierce and malicious that they came out of their own country to fight with the Israelites in the wilderness; and these, when they had done this work, returned to their brethren into the wilderness.But why did they not all now go into Canaan, and pursue this victory?Because God would not permit it, there being several works yet to be done, other people must be conquered, the Israelites must be farther humbled and tried and purged, Moses must die, and then they shall enter, and that in a more glorious manner, even over Jordan, which shall be miraculously dried up, to give them passage. Hormah - That is, utter destruction.