21. When you shall vow a vow unto the LORD your God, you shall not delay to pay it: for the LORD your God will surely require it of you; and it would be sin to you.
22. But if you shall abstain to vow, it shall be no sin to you.
23. That which is gone out from your lips you shall keep and perform; even a freewill offering, according as you have vowed unto the LORD your God, which you have promised with your mouth.