Ecclesiastes 5:4

"When thou hast made a vow to God, delay not to fulfil it; for there is no pleasure in fools: that which thou hast vowed fulfil. Better that thou vowest not, than that thou vowest and fulfillest not. Let not thy mouth bring thy body into punishment; and say not before the messenger of God that it was precipitation: why shall God be angry at thy talk, and destroy the work of thy hands? For in many dreams and words there are also many vanities: much rather fear God!" If they abstained, after Shabbath 30b, from treating the Book of Koheleth as apocryphal, because it begins with תורה דברי (cf. at Ecc 1:3) and closes in the same way, and hence warrants the conclusion that that which lies between will also be תורה דברי, this is in a special manner true of the passage before us regarding the vow which, in thought and expression, is the echo of Deu 23:22-24. Instead of kaashěr tiddor, we find there the words ki tiddor; instead of lelohim (= lěělohim, always only of the one true God), there we have lahovah ělohěcha; and instead of al-teahher, there lo teahher. There the reason is: "for the Lord thy God will surely require it of thee; and it would be sin in thee;" here: for there is no pleasure in fools, i.e., it is not possible that any one, not to speak of God, could have a particular inclination toward fools, who speak in vain, and make promises in which their heart is not, and which they do not keep. Whatever thou vowest, continues Koheleth, fulfil it; it is better (Ewald, 336a) that thou vowest not, than to vow and not to pay; for which the Tra says: "If thou shalt forbear to vow, it shall be no sin in thee" (Deu 23:22). נדר, which, according to the stem-word, denotes first the vow of consecration of setting apart (cogn. Arab. nadar, to separate, נזר, whence נזיר), the…

Four things we are exhorted to in these verses: - I. To be conscientious in paying our vows. 1. A vow is a bond upon the soul (Num 30:2), by which we solemnly oblige ourselves, not only, in general, to do that which we are already bound to do, but, in some particular instances, to do that to do which we were not under any antecedent obligation, whether it respects honouring God or serving the interests of his kingdom among men. When, under the sense of some affliction (Psa 66:14), or in the pursuit of some mercy (Sa1 1:11), thou hast vowed such a vow as this unto God, know that thou hast opened thy mouth unto the Lord and thou canst not go back; therefore, (1.) Pay it; perform what thou hast promised; bring to God what thou hast dedicated and devoted to him: Pay that which thou hast vowed; pay it in full and keep not back any part of the price; pay it in kind, do not alter it or change it, so the law was, Lev 27:10. Have we vowed to give our own selves unto the Lord? Let us then be as good as our word, act in his service, to his glory, and not sacrilegiously alienate ourselves. (2.) Defer not to pay it. If it be in the power of thy hands to pay it today, leave it not till tomorrow; do not beg a day, nor put it off to a more convenient season. By delay the sense of the obligation slackens and cools, and is in danger of wearing off; we thereby discover a loathness and backwardness to perform our vow; and qui non est hodie cras minus aptus erit - he who is not inclined today will be averse tomorrow. The longer it is put off the more difficult it will be to bring ourselves to it; death may not only prevent the payment, but fetch thee to judgment, under the guilt of a broken vow, Psa 76:11. 2. Two reasons are here given why we should speedily and cheerfully pay our vows: - (…

5:4-5 Keep all the promises you make to him: This is virtually a direct quote from the law (Deut 23:21-23; see also Prov 12:22; 20:25). Vows to God were voluntary, but once they were made, it was obligatory to keep them.