Deuteronomy 23:23

23 Forsooth thou shalt keep (thy word), and do that that went out once of thy lips, as thou promisedest to thy Lord God, and hast spoken with thine own will and thy mouth. (But once thy vow hath gone out of thy lips, thou shalt keep thy word, and do it, as thou promisedest to the Lord thy God, and hast spoken with thy own will and thy own mouth.)

Deuteronomy 23:23 Meaning and Commentary

Deuteronomy 23:23

That which is gone out of thy lips thou shalt keep and
perform
Which were in their power to perform and lawful to do; and this is observed to make them watchful and cautious, and not be rash in making vows, since, when once they were made, an exact and rigid performance of them was expected; see ( Ecclesiastes 5:4 Ecclesiastes 5:5 ) ;

[even] a freewill offering, according as thou hast vowed unto the Lord
thy God, which thou hast promised with thy mouth;
be it what it will, as to the matter of it, it was to be paid, and in the manner as it was vowed and promised. Aben Ezra observes, that every vow is a freewill offering, but not every freewill offering a vow; the Targum of Jonathan enumerates the several things to be performed, sin offerings, trespass offerings, burnt offerings, and oblations of holy things, and drink offerings, and gifts of the house of the sanctuary, and alms to the poor.

Deuteronomy 23:23 In-Context

21 When thou makest a vow to thy Lord God, thou shalt not tarry to yield it, for thy Lord God shall ask that of thee; and if thou tarriest, it shall be reckoned to thee into sin. (When thou makest a vow to the Lord thy God, thou shouldest not delay in fulfilling it, for the Lord thy God shall ask for that of thee; and if thou delayest, it shall be reckoned unto thee as a sin.

22 If thou wilt not promise, thou shalt be without sin. (If thou maketh no vow, thou hast not sinned.)

23 Forsooth thou shalt keep (thy word), and do that that went out once of thy lips, as thou promisedest to thy Lord God, and hast spoken with thine own will and thy mouth. (But once thy vow hath gone out of thy lips, thou shalt keep thy word, and do it, as thou promisedest to the Lord thy God, and hast spoken with thy own will and thy own mouth.)

24 If thou enterest into the vineyard of thy neighbour, eat thou (some) grapes, as much as [it] pleaseth thee; but bear thou none out with thee (but carry none away with thee).

25 If thou enterest into the corn (field) of thy friend, thou shalt break off the ears of the corn, and rub them together with thine hands; but thou shalt not reap them with a sickle.