Proverbs 25:18-20

Revised Standard Version

¹⁸ A man who bears false witness against his neighbor
    is like a war club, or a sword, or a sharp arrow.
¹⁹ Trust in a faithless man in time of trouble
    is like a bad tooth or a foot that slips.
²⁰ He who sings songs to a heavy heart
    is like one who takes off a garment on a cold day,
    and like vinegar on a wound.^[a]