Leviticus 5:4
4 or if anyone utters with his lips a irash oath to do evil or to do good, any sort of rash oath that people jswear, and it is hidden from him, when he comes to know it, and he realizes his guilt in any of these;
Leviticus 19:11–12
11 e“You shall not steal; fyou shall not deal falsely; you shall not lie to one another. 12 gYou shall not swear by my name falsely, and so hprofane the name of your God: I am the Lord.