Numbers 30:10-12

(iv) A vow made by a married woman without her husband's knowledge (Numbers 30:10).

Numbers 30:10

‘And if she (a woman) vowed in her husband's house, or bound her soul by a bond with an oath, and her husband heard it, and held his peace at her, and disallowed her not; then all her vows shall stand, and every bond with which she bound herself shall stand.'

This case was of a married woman who made a vow without consulting her husband as the head of the household. Such a vow was always to be seen as subject to the husband's agreement, for her fulfilling of the vow would necessarily affect the whole household. If he heard of it and allowed it by his silence then the vow continued as binding on all. She was bound by her dedicatory vow.

Numbers 30:12

‘But if her husband made them null and void in the day that he heard them, then whatever proceeded out of her lips concerning her vows, or concerning the bond of her soul, shall not stand. Her husband has made them void, and Yahweh will forgive her.'

But if her husband disallowed the vow or vows on the day that he heard of it/them, then they ceased to be binding. Whatever she had spoken was cancelled. Her husband had made them void and Yahweh would forgive her.