Original Douay–Rheims AnnotationsNumbers 30

Shall be frustrate.

^[1] Vows, which fathers and husbands could frustrate in their daughters and wives, must needs be meant of things not commanded by God. For it was not in their power to dispense in God's precepts. As for example, touching the feast of Expiation, it was not in the arbitrement of fathers and husbands (as here it was v. 14.) whether their daughters and wives should fast or no: but was absolutely said (Levit. 23. v. 29.) ^[2] Every soul that is not afflicted (that is, which fasteth not) this day, shall perish out of his people. And so in other precepts were necessary obligations. Besides which it is grateful also to God, that his servants bind themselves to other good works, whereto they are not otherwise bound.

• 1 Vows of things not commanded.
• 2 S. Aug. q. 57. in Num.