Sirach 23:9-11

New Revised Standard Version Updated Edition

⁹ Do not accustom your mouth to oaths
    nor habitually utter the name of the Holy One,^(A)
10 for as a slave who is constantly under scrutiny
    will not lack bruises,
so also the person who always swears and utters the Name
    will never be cleansed^[a] from sin.^(B)
11 The one who swears many oaths is full of iniquity,
    and the scourge will not leave his house.
If he swears in error, his sin remains on him,
    and if he disregards it, he sins doubly;
if he swears a false oath, he will not be justified,
    for his house will be filled with calamities.^(C)