Be careful to follow through on what comes from your lips, because you have freely vowed to the LORD your God with your own mouth.
KJV
That which is gone out of thy lips thou shalt keep and perform; [even] a freewill offering, according as thou hast vowed unto the LORD thy God, which thou hast promised with thy mouth.
ASV
That which is gone out of thy lips thou shalt observe and do; according as thou hast vowed unto Jehovah thy God, a freewill-offering, which thou hast promised with thy mouth.