Ecclesiastes 5:4-6

4When you make a vow to God, do not delay in paying it. For God takes no pleasure in fools: Pay what you vow!

5It is better for you not to vow than to vow and not pay it.

6Do not let your mouth cause you to sin, and do not tell the priest, “It was a mistake!” Why make God angry at you so that he would destroy the work of your hands?”