Joshua 11:13

Overview - Joshua 11
Divers kings overcome at the waters of Merom.
10 Hazor is taken and burnt.
16 All the country taken by Joshua.
21 The Anakims cut off.
23 The land rest from war.
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Joshua 11:13  (King James Version)
But as for the cities that stood still in their strength, Israel burned none of them, save Hazor only; that did Joshua burn.

in their
Hebrew on their heap.
The Vulgate, Syriac, Onkelos and Waterland render {l tillom,} "on their hills." As the cities of the plain might be easily
attacked and carried, Joshua destroyed them; but as those on mountains, hills, or other eminences, might be retained by him with little trouble, prudence would dictate their preservation. Jeremiah 30:18