Eclesiastés 5

You should not use your mouth so as to cause your flesh to sin. And you should not say, in the sight of an Angel, “There is no Providence.” For God, being angry at your words, may scatter all the works of your hands.

Mejor es que no prometas, que no que prometas y no pagues.

Better is it that thou shouldest not vow, than that thou shouldest vow and not pay.

It is better that you should not vow, than that you should vow and not pay.