Shall fell every good tree - Every tree by which your enemies may serve themselves for fortifications, etc. But surely fruit trees are not intended here; for this was positively against the law of God, Deuteronomy 20:19, Deuteronomy 20:20; : "When thou shalt besiege a city - thou shalt not destroy the trees thereof - for the tree of the field is man's life - only the trees which thou knowest that they be not trees for meat, thou shalt destroy and cut them down."
Stop all wells of water - In those hot countries this would lead sooner than any thing else to reduce an enemy.
Mar every good piece of land with stones - Such a multitude of men, each throwing a stone on a good field as they passed, would completely destroy it.
Ye shall fell every good tree - This is not an infringement of the rule laid down in Deuteronomy 20:19-20. The Israelites were not forbidden to fell the fruit trees in an enemy‘s country, as a part of the ravage of war, when they had no thoughts of occupying the country. The plan of thus injuring an enemy was probably in general use among the nations of these parts at the time. We see the destruction represented frequently on the Assyrian monuments and mentioned in the inscriptions of Egypt.
And stop all wells of water - The stoppage of wells was a common feature of ancient, and especially Oriental, warfare (compare Genesis 26:15-18).
Mar with stones - The exact converse of that suggested in Isaiah 5:2. The land in and about Palestine is so stony that the first work of the cultivator is to collect the surface stones together into heaps. An army marching through a land could easily undo this work, dispersing the stones thus gathered, and spreading them once more over the fields.