Ecclesiastes 10:13-15

¹³The first words of his mouth are foolish, and the end of his talk is evil crime.

¹⁴The foolish are full of words; man has no knowledge of what will be; and who is able to say what will be after him?

¹⁵The work of the foolish will be a weariness to him, because he has no knowledge of the way to the town.