3 Bible Verses about People Being Polluted

Woe unto you! because you are like tombs unseen, and men walking over them do not know it.

looking diligently lest any one may fail from the grace of God; lest any root of bitterness springing up may trouble you, and through it many may be defiled;

The tongue, a fire, the world of iniquity: the tongue sits down in the midst of our members, and corrupting the whole body, and setting on fire the course of nature; and it is set on fire from hell.