Deuteronomy Chapter 23, Verse 23

23: 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.- edit KJV text
23: But that which is once gone out of thy lips, thou shalt observe, and shalt do as thou hast promised to the Lord thy God, and hast spoken with thy own will and with thy own mouth.— edit Douay text
23: Thou shalt observe the words that proceed from between thy lips; and as thou hast vowed a gift to the Lord God, [so] shalt thou do that which thou hast spoken with thy mouth.— edit LXX text