King James Version
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.English Standard Version
You shall be careful to do what has passed your lips, for you have voluntarily vowed to the LORD your God what you have promised with your mouth.Catholic Public Domain Version
But as soon as it has departed from your lips, you shall observe and do just as you have promised to the Lord your God and just as you have spoken by your own free will and with your own mouth