Numbers 21:2

21:2 So Israel made a vow to the Lord and said, “If you will indeed deliver this people into our hand, then we will utterly destroy their cities.”

Numbers 33:52

33:52 you must drive out all the inhabitants of the land before you. Destroy all their carved images, all their molten images, and demolish their high places.

tn The Hebrew text uses a cognate accusative with the verb: They vowed a vow. The Israelites were therefore determined with God’s help to defeat Arad.

tn The Hebrew text has the infinitive absolute and the imperfect tense of נָתַן (natan) to stress the point – if you will surely/indeed give.”

tn Heb “my.”

tn On the surface this does not sound like much of a vow. But the key is in the use of the verb for “utterly destroy” – חָרַם (kharam). Whatever was put to this “ban” or “devotion” belonged to God, either for his use, or for destruction. The oath was in fact saying that they would take nothing from this for themselves. It would simply be the removal of what was alien to the faith, or to God’s program.

tn The Hebrew text repeats the verb “you will destroy.”