Proverbs 27:1-3

New International Reader's Version

27 Don’t brag about tomorrow.
    You don’t know what a day will bring.

² Let another person praise you, and not your own mouth.
    Let an outsider praise you, and not your own lips.

³ Stones are heavy, and sand weighs a lot.
    But letting a foolish person make you angry is a heavier load than both of them.