Matthew Poole and continuators on Numbers 30:13

13 Every vow, and every binding oath to afflict the soul , her husband may establish it, or her husband may make it void.

i. e. Her self by fasting, which oft goes under that name, as Levit. 16. 29, 31. and 23. 27, 32. Isa. 58. 5. by watching, or the like. And these words are added not for limitation, for it is manifest from v. 5, 8, 10, 12. that the power of Parents and Husbands was more general and large, but for amplification, to shew that the Husband had this power not onely in those vows which concerned himself or his estate, but also in those which might seem onely to concern her own person, or Body. And the reason hereof is, because the Wives person or body being the Husbands right, she might not do any thing to the injury of her Body without his consent.