Peter Lewerin has suggested Proverbs 17:28 as an early source of the line: "Even a fool, when he holdeth his peace, is counted wise: and he that shutteth his lips is esteemed a man of understanding."
it then looks like the scriptures, having been there some millenia ahead of these quotable people, has won the day as the original source of the quote's wisdom.
Linkback: https://tubagbohol.mikeligalig.com/index.php?topic=76734.0