23 They captured the king of Ai alive, and brought him to Joshua. 24 It happened, when Israel had made an end of killing all the inhabitants of Ai in the field, in the wilderness in which they pursued them, and they had all fallen by the edge of the sword, until they were consumed, that all Israel returned to Ai, and struck it with the edge of the sword. 25 All that fell that day, both of men and women, were twelve thousand, even all the men of Ai. 26 For Joshua didn’t draw back his hand, with which he stretched out the javelin, until he had utterly destroyed all the inhabitants of Ai. 27 Only the livestock and the spoil of that city Israel took for prey to themselves, according to the word of Yahweh which he commanded Joshua. 28 So Joshua burnt Ai, and made it a heap forever, even a desolation, to this day. 29 He hanged the king of Ai on a tree until the evening, and at the sundown Joshua commanded, and they took his body down from the tree, and threw it at the entrance of the gate of the city, and raised a great heap of stones on it that remains to this day.
Matthew Henry's Commentary on Joshua 8:23-29
Commentary on Joshua 8:23-29
(Read Joshua 8:23-29)
God, the righteous Judge, had sentenced the Canaanites for their wickedness; the Israelites only executed his doom. None of their conduct can be drawn into an example for others. Especial reason no doubt there was for this severity to the king of Ai; it is likely he had been notoriously wicked and vile, and a blasphemer of the God of Israel.