“If a woman makes a promise or pledge while she is married,
and if her husband hears about it but says nothing and does not stop her, she must keep her promise or pledge.
“If a man makes a promise to the Lord or says he will do something special, he must keep his promise. He must do what he said.
“If a widow or divorced woman makes a promise, she must do whatever she promised.
Elkanah, Hannah’s husband, said to her, “Do what you think is best. You may stay home until the boy is old enough to eat. May the Lord do what you have said.” So Hannah stayed at home to nurse her son until he was old enough to eat.