'Ruinous' in the Bible

“Have you not heard [says the God of Israel]That I did it long ago,That I planned it in ancient times?Now I have brought it to pass,That you [king of Assyria] would [be My instrument to] turn fortified cities into ruinous heaps.

They hatch vipers’ eggs and weave the spider’s webs;He who eats of their eggs dies,And from an egg which is crushed a viper breaks out.