Jeremiah 51:26

And they shall not take of thee a stone for a corner, nor a stone for foundations; but thou shalt be desolate for ever, saith the LORD.

They shall not take of thee a stone for a corner, nor a stone for foundations. The cornerstone was the most important one in the building; the foundation stones came next in importance (Eph. 2:29 ). So the sense is, even as there shall be no stones useful for building left of thee, so no leading prince or governors shall come forth from thy inhabitants.