Proverbs 26:10-12

Common English Bible

¹⁰ Like an archer who wounds someone randomly,
    so is one who hires a fool or a passerby.
¹¹ Like a dog that returns to its vomit,
    so a fool repeats foolish mistakes.
¹² Do you see people who consider themselves wise?
    There is more hope for a fool than for them.