English Standard Version
or if anyone utters with his lips a rash oath to do evil or to do good, any sort of rash oath that people swear, and it is hidden from him, when he comes to know it, and he realizes his guilt in any of these;New International Version
"'Or if a person thoughtlessly takes an oath to do anything, whether good or evil-in any matter one might carelessly swear about-even though he is unaware of it, in any case when he learns of it he will be guilty.Catholic Public Domain Version
The soul who swears and offers from his own lips that he would do either evil or good, and who will have bound the same with an oath and with his own words, and, having forgotten it, afterwards understands his transgression