NET
53 Even if Babylon climbs high into the sky and fortifies her elevated stronghold, I will send destroyers against her,” says the Lord.
Darby
53 Though Babylon should mount up to the heavens, and though she should fortify the height of her strength, yet from me shall spoilers come unto her, saith Jehovah.
KJV
53 Though Babylon should mount up to heaven, and though she should fortify the height of her strength, [yet] from me shall spoilers come unto her, saith the LORD.