Numbers 30:7
And her husband heard it, and held his peace at her in the day that he heard it: then her vows shall stand, and her bonds wherewith she bound her soul shall stand.
Cross-reference
Numbers 30:14
Parallel
Numbers 30:14 confirms that the husband's silence after hearing the vow makes it binding, expanding the same rule from 30:7.
1 Samuel 1:23
Parallel
1 Samuel 1:23 shows Elkanah approving Hannah's vow, illustrating the husband's authority to confirm or nullify described in Numbers.