Deuteronomy 23:21-23

21 aWhen you make a vow to the Lord your God, you shall not delay to pay it, for it would be sin in you,
Lit for
and the Lord your God will surely require it of you.
22However, if you refrain from vowing, it would not be sin in you. 23You shall be careful to perform what goes out from your lips, just as you have voluntarily vowed to the Lord your God, what you have
Lit spoken with your mouth
promised.
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