Joshua said, Roll great stones to the mouth of the cave, and set men by it to keep them:
By this instance, the Lord shows us the great interest he takes in his elect people; for it was an instance of rare condescension to place kings under their feet, and allow them to insult over their dignity, as if they had been petty robbers; as it is said in the Psalm, A two-edged sword is in their hand to execute vengeance on the nations, to bind their kings with fetters, and their nobles with chains of iron; to execute the judgment written: this honor have all the saints. (Psalms 149:6) That fearful sight had at the same time the effect of striking terror, so as to prevent the Israelites from imitating the manners of nations whose crimes they had seen so severely punished. Accordingly, we repeatedly meet in the books of Moses with this warning, You have seen how God took vengeance on the nations who were in the land of Canaan before you. Beware, therefore, of provoking the wrath of your God by their perverse doings. In one word, that God might be worshipped with greater sanctity, he ordered the land to be purged of all pollutions, and as the inhabitants had been excessively wicked, he willed that his curse should rest upon them in a new and unwonted manner. 