Ecclesiastes 10:1-3

International Standard Version

10 As dead flies cause the perfumer’s ointment to stink,
so also does a little foolishness to one’s reputation of wisdom and honor.
² A wise man’s heart tends toward his right,
    but a fool’s heart tends toward his left.
³ Furthermore, the way a fool lives shows he has no sense;
    he proclaims to everyone that he’s a fool.