If a woman in her husband's house has made a vow or put herself under an obligation with an oath,

Numbers 30:9
Every vow a widow or divorced woman pledges to fulfill is binding on her.

Numbers 30:11
and her husband hears of it but says nothing to her and does not prohibit her, then all the vows or pledges by which she has bound herself shall stand.

1 Samuel 1:23
"Do what you think is best," her husband Elkanah replied, "and stay here until you have weaned him. Only may the LORD confirm His word." So Hannah stayed and nursed her son until she had weaned him.

And if she vowed in her husband's house, or bound her soul by a bond with an oath;