Joshua 9:19-20 but all the leaders answered, “We have given them our oath by the LORD, the God of Israel, and we cannot touch them now. This is what we will do to them: We will let them live, so that wrath will not fall on us for breaking the oath we swore to them.”

Judges 11:30-31,35 And Jephthah made a vow to the LORD: “If you give the Ammonites into my hands, whatever comes out of the door of my house to meet me when I return in triumph from the Ammonites will be the LORD’s, and I will sacrifice it as a burnt offering.” . . . When he saw her, he tore his clothes and cried, “Oh! My daughter! You have made me miserable and wretched, because I have made a vow to the LORD that I cannot break.”

Numbers 30:2 When a man makes a vow to the LORD or takes an oath to obligate himself by a pledge, he must not break his word but must do everything he said.

Deuteronomy 23:21-23 If you make a vow to the LORD your God, do not be slow to pay it, for the LORD your God will certainly demand it of you and you will be guilty of sin. But if you refrain from making a vow, you will not be guilty. Whatever your lips utter you must be sure to do, because you made your vow freely to the LORD your God with your own mouth.

Proverbs 18:7 A fool’s mouth is his undoing, and his lips are a snare to his soul.

Proverbs 20:25 It is a trap for a man to dedicate something rashly and only later to consider his vows.

Ecclesiastes 5:4-6 When you make a vow to God, do not delay in fulfilling it. He has no pleasure in fools; fulfill your vow. It is better not to vow than to make a vow and not fulfill it. Do not let your mouth lead you into sin. And do not protest to the temple messenger, “My vow was a mistake.” Why should God be angry at what you say and destroy the work of your hands?