He who disregarded advice ended up with a scar on the forehead.
Proverb's meaning
Listen to advice.
From: Shona in Zimbabwe
General comments
The Banyoro in Uganda have a vulgar version: "One who did not listen to advice excreted on a musororo plant". The "musororo" plant is renown for straightening up again when bent, thus when the musororo straightened, it splashed the excretion back on the culprit.