Ecclesiastes 10 13
Fools begin by saying foolish things, and end up talking evil nonsense.
Compare with other 3 random translations
WEB Ecclesiastes 10:13The beginning of the words of his mouth is foolishness; and the end of his talk is mischievous madness.
GW Ecclesiastes 10:13A fool starts out by talking foolishness and ends up saying crazy things that are dangerous.
KJV Ecclesiastes 10:13The beginning of the words of his mouth is foolishness: and the end of his talk is mischievous madness.