TKJU(i)
21 When you shall vow a vow to the LORD your God, you shall not slack to pay it: For the LORD your God will surely require it of you; and it would be sin in you.
22 But if you shall forbear to vow, it shall be no sin in you.
23 That which is gone out of your lips you shall keep and perform; even a freewill offering, according to as you have vowed to the LORD your God, which you have promised with your mouth.