Deuteronomy 23 Vows

A vow is a promise to be fulfilled lest you bring sin into the camp. Moses, as the compiler of what God had said wrote: “When you make a vow to the Lord your God you must notdelay in fulfilling it, for otherwise he will surely hold you accountable as a sinner.  If you refrain from making a vow, it will not be sinful.  Whatever you vow, you must be careful to do what you have promised” [Deut 23:21-24]

Interesting that both Moses and Solomon wrote much the same thing. In Ecclesiastes Solomon added this: if  make a vow, be sure to keep it otherwise you will be seen as a fool.. [Eccl 5:4] 

God is serious about what we promise.  Today watch you what you say and what you promise to God or another.