Ecclesiastes 10:2 in the King James Version
A wise man’s heart is at his right hand; but a fool’s heart at his left.
Context
1 Dead flies cause the oil of the perfumer to produce an evil odor; so does a little folly outweigh wisdom and honor.
2 A wise man’s heart is at his right hand, but a fool’s heart at his left.
3 Yes also when the fool walks by the way, his understanding fails him, and he says to everyone that he is a fool.