Deuteronomio 23

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.

Guardarás lo que tus labios pronunciaren; y harás, como prometiste á Jehová tu Dios, lo que de tu voluntad hablaste por tu boca.

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.

You shall observe and do that which has gone out of your lips. Whatever you have vowed to the LORD your God as a free will offering, which you have promised with your mouth, you must do.