9 In that day their strong cities, which they left because of the Israelites, will be like places abandoned to thickets and undergrowth. And all will be desolation.

Read Isaiah 17:9 Using Other Translations

In that day shall his strong cities be as a forsaken bough, and an uppermost branch, which they left because of the children of Israel: and there shall be desolation.
In that day their strong cities will be like the deserted places of the wooded heights and the hilltops, which they deserted because of the children of Israel, and there will be desolation.
Their largest cities will be like a deserted forest, like the land the Hivites and Amorites abandoned when the Israelites came here so long ago. It will be utterly desolate.