Be silent, or say something better than silence.

Silence is the best answer to the stupid. The fool has his answer on the tip of his tongue.

Silence is also speech.

There is no reply to the ignorant like keeping silence.

We must have reasons for speech but we need none for silence.

Consult with your pillow.

A fly will not get into a closed mouth.

No wisdom like silence.

Silence is golden.

Shut your mouth and you’ll catch no flies.