Ecclesiastes 10:11-15

11If the snake should bite before it is charmed, the snake charmer is in trouble.

12The words of a wise person win him favor, but the words of a fool are self-destructive.

13At the beginning his words are foolish and at the end his talk is wicked madness,

14yet a fool keeps on babbling. No one knows what will happen; who can tell him what will happen in the future?

15The toil of a stupid fool wears him out, because he does not even know the way to the city.