Ecclesiastes 5:4-5
When you make a vow to God, do not delay in fulfilling it, because He takes no pleasure in fools. Fulfill your vow. / It is better not to vow than to make a vow and not fulfill it.

Numbers 30:2
If a man makes a vow to the LORD or swears an oath to obligate himself by a pledge, he must not break his word; he must do everything he has promised.

Deuteronomy 23:21-23
If you make a vow to the LORD your God, do not be slow to keep it, because He will surely require it of you, and you will be guilty of sin. / But if you refrain from making a vow, you will not be guilty of sin. / Be careful to follow through on what comes from your lips, because you have freely vowed to the LORD your God with your own mouth.

Jonah 2:9
But I, with the voice of thanksgiving, will sacrifice to You. I will fulfill what I have vowed. Salvation is from the LORD!”

Judges 11:30-31
Jephthah made this vow to the LORD: “If indeed You will deliver the Ammonites into my hand, / then whatever comes out the door of my house to greet me on my triumphant return from the Ammonites will belong to the LORD, and I will offer it up as a burnt offering.”

1 Samuel 1:11
And she made a vow, saying, “O LORD of Hosts, if only You will look upon the affliction of Your maidservant and remember me, not forgetting Your maidservant but giving her a son, then I will dedicate him to the LORD all the days of his life, and no razor shall ever touch his head.”

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

Genesis 28:20-22
Then Jacob made a vow, saying, “If God will be with me and watch over me on this journey, and if He will provide me with food to eat and clothes to wear, / so that I may return safely to my father’s house, then the LORD will be my God. / And this stone I have set up as a pillar will be God’s house, and of all that You give me I will surely give You a tenth.”

Leviticus 27:2
“Speak to the Israelites and say to them, ‘When someone makes a special vow to the LORD involving the value of persons,

Matthew 5:33-37
Again, you have heard that it was said to the ancients, ‘Do not break your oath, but fulfill your vows to the Lord.’ / But I tell you not to swear at all: either by heaven, for it is God’s throne; / or by the earth, for it is His footstool; or by Jerusalem, for it is the city of the great King. ...

Acts 18:18
Paul remained in Corinth for quite some time before saying goodbye to the brothers. He had his head shaved in Cenchrea to keep a vow he had made, and then he sailed for Syria, accompanied by Priscilla and Aquila.

Acts 21:23-24
Therefore do what we advise you. There are four men with us who have taken a vow. / Take these men, purify yourself along with them, and pay their expenses so they can have their heads shaved. Then everyone will know that there is no truth to these rumors about you, but that you also live in obedience to the law.

James 5:12
Above all, my brothers, do not swear, not by heaven or earth or by any other oath. Simply let your “Yes” be yes, and your “No,” no, so that you will not fall under judgment.

Matthew 15:8-9
‘These people honor Me with their lips, but their hearts are far from Me. / They worship Me in vain; they teach as doctrine the precepts of men.’”

Romans 12:1
Therefore I urge you, brothers, on account of God’s mercy, to offer your bodies as living sacrifices, holy and pleasing to God, which is your spiritual service of worship.