Leviticus 5:4
New International Version
4 or if anyone thoughtlessly takes an oath(A) to do anything, whether good or evil(B) (in any matter one might carelessly swear about) even though they are unaware of it, but then they learn of it and realize their guilt—
Deuteronomy 23:21-23
New International Version
21 If you make a vow to the Lord your God, do not be slow to pay it,(A) for the Lord your God will certainly demand it of you and you will be guilty of sin.(B) 22 But if you refrain from making a vow, you will not be guilty.(C) 23 Whatever your lips utter you must be sure to do, because you made your vow freely to the Lord your God with your own mouth.
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