Ecclesiastes 5:4-6

New International Version

⁴ When you make a vow to God, do not delay to fulfill it.^(A) He has no pleasure in fools; fulfill your vow.^{(B) 5} It is better not to make a vow than to make one and not fulfill it.^{(C) 6} 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?