9Whoso removeth stones shall be hurt therewith, and he that cleaveth wood shall be endangered thereby.
10If the iron be blunt, and one do not whet the edge, then must he put forth more strength; but an advantage for giving success hath wisdom.
11If a serpent bite before he is charmed, then there is no advantage to the charmer.
12The words of a wise man's mouth are gracious; but the lips of a fool are his destruction.
13The beginning of the words of his mouth is folly, and the end of his talk is mischievous madness.
14A fool also multiplieth words, though no man knoweth what shall be; and who can tell him what shall be after him?
15The labor of the foolish man wearieth him, because he knoweth not how to go to the city.
16Woe to thee, O land, when thy king is a child, and thy princes feast in the morning!
Ecclesiastes 10
Ecclesiastes 10:9-16