Ecclesiastes 10:1 in the World English Bible
Dead flies cause the oil of the perfumer to produce an evil odor; so does a little folly outweigh wisdom and honor.
Context
1 Dead flies cause the ointment of the apothecary to send forth a stinking savour: so doth a little folly him that is in reputation for wisdom and honour.
2 A wise man’s heart is at his right hand; but a fool’s heart at his left.