Ecclesiastes 10:14 KJV
A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?
Ecclesiastes 10:14, King James Version
In context
13 The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.
14 A fool also is full of words: a man cannot tell what shall be; and what shall be after him, who can tell him?
15 The labour of the foolish wearieth every one of them, because he knoweth not how to go to the city.