Proverbs 20:25
It is dangerous to make a vow to God before counting the cost.
Leviticus 5:15
If any of you fail to do your duty by unintentionally doing something wrong with any of Jehovah's holy things, bring a guilt offering to Jehovah. It must be a ram that has no defects or its value in silver weighed according to the official standards of the holy place.
Leviticus 22:10-15
Only a member of a priestly family may eat any of the sacred offerings. No one else may eat them, not even someone staying with a priest or hired by him.
Leviticus 27:9-10
If the vow is to give the kind of animal that people offer to Jehovah, it will be considered holy.
Leviticus 27:30-31
One-tenth of what comes from the land, whether grain or fruit, is holy and belongs to Jehovah.
Numbers 30:2-16
If a man makes a vow to Jehovah that he will do something or swears an oath that he will not do something, he must not break his word. He must do everything he said he would do.
Proverbs 18:7
A fool's mouth is his ruin. His lips are the snares of his life.
Ecclesiastes 5:4-6
Do not be late in paying a vow you make to God. He takes no delight in fools. Pay what you vow!
Malachi 3:8-10
I ask you: 'will you rob and defraud God? Of course not, yet you are robbing and defrauding me!' 'How have we robbed and defrauded?' You ask. 'In the matter of tithes and offerings.'
Matthew 5:33
You were also told that you should keep a promise (oath). Always keep your promises (vows) to Jehovah.