Ecclesiastes 10:10-14

If the axe is dull and he does not sharpen its edge, then he must exert more strength. Wisdom has the advantage of bringing success.

If the serpent bites before being charmed, there is no benefit for the charmer.

Words from the mouth of a wise person are gracious, while the lips of a fool consume him;

the beginning of his talking is foolishness, and the end of it is evil insanity.

Yet the fool multiplies words. No person knows what will happen, and who can tell him what will come after him?