Prov.17.28

Even a fool, when he holdeth his peace, is counted wise: and he that shutteth his lips is esteemed a man of understanding.

Prov.17.28

Even dunces who keep quiet are thought to be wise; as long as they keep their mouths shut, they're smart.

Prov.17.28

Even a fool is thought wise if he keeps silent, and discerning if he holds his tongue.

Prov.17.28

Even fools are thought to be wise when they keep silent; when they keep their mouths shut, they seem intelligent.