Accustom not thy mouth to swearing; neither use thyself to the naming of the Holy One.
WEB
Don’t accustom your mouth to an oath, and don’t be accustomed to naming the Holy One,
DRC23:10
Let not thy mouth be accustomed to swearing: for in it there are many falls. And let not the naming of God be usual in thy mouth, and meddle not with the names of saints, for thou shalt not escape free from them.
LXXE
Accustom not thy mouth to swearing; neither use thyself to the naming of the Holy One.