Ben Sira 23:9

9 Do not accustom your mouth to oaths, nor habitually utter the name of the Holy One;

Ben Sira 23:9 In-Context

7 Listen, my children, to instruction concerning the mouth; the one who observes it will never be caught.
8 Sinners are overtaken through their lips; by them the reviler and the arrogant are tripped up.
9 Do not accustom your mouth to oaths, nor habitually utter the name of the Holy One;
10 for as a servant who is constantly under scrutiny will not lack bruises, so also the person who always swears and utters the Name will never be cleansed from sin.
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.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.