Prov.23.9

Speak not in the ears of a fool: for he will despise the wisdom of thy words.

Prov.23.9

Don't bother talking sense to fools; they'll only poke fun at your words.

Prov.23.9

Do not speak to a fool, for he will scorn the wisdom of your words.

Prov.23.9

Do not speak in the hearing of a fool, For he will despise the wisdom of your words.