Numbers 30:9-11

Young's Literal Translation

⁹ `As to the vow of a widow or cast-out woman, all that she hath bound on her soul is established on her.

¹⁰ `And if [in] the house of her husband she hath vowed, or hath bound a bond on her soul with an oath,

¹¹ and her husband hath heard, and hath kept silent at her -- he hath not disallowed her -- then have all her vows been established, and every bond which she hath bound on her soul is established.