Deuteronomy 23:23

23 If you say you're going to do something, do it. Keep the vow you willingly vowed to God, your God. You promised it, so do it.

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 you make a vow to God, your God, don't put off keeping it; God, your God, expects you to keep it and if you don't you're guilty

22 But if you don't make a vow in the first place, there's no sin.

23 If you say you're going to do something, do it. Keep the vow you willingly vowed to God, your God. You promised it, so do it.

24 When you enter your neighbor's vineyard, you may eat all the grapes you want until you're full, but you may not put any in your bucket or bag.

25 And when you walk through the ripe grain of your neighbor, you may pick the heads of grain, but you may not swing your sickle there.