Numbers 30:6

If she marries a husband, while under her vows or any thoughtless utterance of her lips by which she has bound herself,

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And if she had at all an husband, when she vowed, or uttered ought out of her lips, wherewith she bound her soul;

"If she marries after she makes a vow or after her lips utter a rash promise by which she obligates herself

If she has a husband, and she has vowed anything, then, once the word has gone out of her mouth, she will have obligated her soul by an oath