Ecclesiastes 5:3-5

Douay-Rheims 1899 American Edition

³ If thou hast vowed any thing to God, defer not to pay it: for an unfaithful and foolish promise displeaseth him: but whatsoever thou hast vowed, pay it.

⁴ And it is much better not to vow, than after a vow not to perform the things promised.

⁵ Give not thy mouth to cause thy flesh to sin: and say not before the angel: There is no providence: lest God be angry at thy words, and destroy all the works of thy hands.