Matthew Poole and continuators on Numbers 30:10

10 And if she vowed in her husbands house , or bound her soul by a bond with an oath;

i. e. If she that now is a Widow, or divorced made that vow whilest her Husband lived with her; as suppose she then vowed, that if she was left a Widow, she would give such a proportion of her estate to pious or charitable uses, of which vow she might repent when she came to be a Widow, and might believe or pretend she was free from it, because that vow was made in her Husbands life time, which is here granted, in case her Husband then disallowed it, but denyed, in case by silence, or otherwise he consented to it. And thus this Law is sufficiently distinguished from that above, v. 6, 7, 8.