Deuteronomy 13:15

15you must by all means
The Hebrew text uses the infinitive absolute for emphasis, indicated in the translation by the words “by all means.” Cf. KJV, NASB “surely”; NIV “certainly.”
slaughter the inhabitants of that city with the sword; annihilate
Or “put under divine judgment. The Hebrew word (חֵרֶם, kherem) refers to placing persons or things under God’s judgment, usually to the extent of their complete destruction.Though primarily applied against the heathen, this severe judgment could also fall upon unrepentant Israelites (cf. the story of Achan in Josh 7). See also the note on the phrase “divine judgment” in Deut 2:34.
with the sword everyone in it, as well as the livestock.
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