John Gill Commentary Joshua 11:9

"And Joshua did unto them as Jehovah bade him: he hocked their horses, and burnt their chariots with fire." — Joshua 11:9 (ASV)

And Joshua did unto them as the Lord bade him
Namely, in the following instances:

he houghed their horses, and burnt their chariots with fire ;
not consulting his own worldly interest or that of the people of Israel, but the command of God, which he carefully obeyed, and reserved none for himself or them, as David in another case afterwards did; see (2 Samuel 8:4) .