NET

26 Certainly you must have heard! Long ago I worked it out, in ancient times I planned it, and now I am bringing it to pass. The plan is this: Fortified cities will crash into heaps of ruins.

Darby

26 Hast thou not heard that long ago I did it, and that from ancient days I formed it? Now have I brought it to pass, that thou shouldest lay waste fortified cities [into] ruinous heaps.

KJV

26 Hast thou not heard long ago, [how] I have done it; [and] of ancient times, that I have formed it? now have I brought it to pass, that thou shouldest be to lay waste defenced cities [into] ruinous heaps.