Salmos 66

Salmos 66:13-14

Therefore, because we have been speaking of the nature of marriage as the Lord has given it, consequently, this must be examined with the greatest care, namely, what you devoutly willed beforehand (if there could have been anything). Because the use of things conceded by God is not forbidden to human beings, one should not conclude that therefore one need not render to God what he has vowed. It is written: "I will pay you my vows, those that my lips uttered." And lest anyone seek to use tribulation as a reason for excusing himself, in order to gain the freedom to evade a promise or to think of himself as free from what he has vowed, by saying that he was forced to vow something not by his own will but because of tribulation, the blessed David teaches that everything that was legitimately promised, even in tribulation, must be given back to God, when he says to God, "I will pay you my vows, those that my lips uttered." And he added immediately, "my mouth promised when I was in trouble." But in Deuteronomy, it is also written, "If you make a vow to the Lord your God, do not postpone fulfilling it; for the Lord your God will surely require it of you, and you would incur guilt. But if you refrain from vowing, you will not incur guilt. Whatever your lips utter, you must diligently perform, just as you have freely vowed to the Lord your God with your own mouth." And Solomon says, "When you make a vow to God, do not delay fulfilling it; … Fulfill what you vow. It is better that you should not vow than that you should vow and not fulfill it." — LETTER 1:11