Ecclesiastes 5:2-5

Do not be hasty in word or impulsive in thought to bring up a matter in the presence of God. For God is in heaven and you are on the earth; therefore let your words be few. For the dream comes through much effort and the voice of a fool through many words. When you make a vow to God, do not be late in paying it; for He takes no delight in fools. Pay what you vow! It is better that you should not vow than that you should vow and not pay.