Sirach 23:13-15

Revised Standard Version Catholic Edition

¹³ Do not accustom your mouth to lewd vulgarity,
    for it involves sinful speech.
¹⁴ Remember your father and mother
    when^[a] you sit among great men;
lest you be forgetful in their presence,
    and be deemed a fool on account of your habits;
then you will wish that you had never been born,
    and you will curse the day of your birth.
¹⁵ A man accustomed to use insulting words
    will never become disciplined all his days.