Proverbs 10:18-20

New International Version

¹⁸ Whoever conceals hatred with lying lips^(A)
    and spreads slander is a fool.

¹⁹ Sin is not ended by multiplying words,
    but the prudent hold their tongues.^(B)

²⁰ The tongue of the righteous is choice silver,
    but the heart of the wicked is of little value.