Sirach 23:11-13

Revised Standard Version Catholic Edition

¹¹ A man who swears many oaths will be filled with iniquity,
    and the scourge will not leave his house;
if he offends, his sin remains on him,
    and if he disregards it, he sins doubly;
if he has sworn needlessly, he will not be justified,
    for his house will be filled with calamities.

¹² There is an utterance which is comparable to death;^[a]
    may it never be found in the inheritance of Jacob!
For all these errors will be far from the godly,
    and they will not wallow in sins.
¹³ Do not accustom your mouth to lewd vulgarity,
    for it involves sinful speech.