“A young girl, who still lives in her father’s house, might make a vow to the Lord that she will do something or swear an oath that she won’t do something.
At the end of those two months she came back to her father. He did to her what he had vowed, and she never had a husband. So the custom began in Israel
She made this vow, “Lord of Armies, if you will look at my misery, remember me, and give me a boy, then I will give him to you for as long as he lives. A razor will never be used on his head.”