Charles Ellicott Commentary Proverbs 27:3

"A stone is heavy, and the sand weighty; But a fool`s vexation is heavier than they both." — Proverbs 27:3 (ASV)

But a fool’s wrath is heavier than them both — that is, harder to bear. (Compare to Sirach 12:15.) The “fool” here (evil) is the headstrong, self-willed person who has never learned to control himself but bursts out into the maddest rage when crossed.