For example, Hannah, the mother of the prophet Samuel, “went on to make a vow and say: ‘ O Jehovah of armies, if... you will not forget your slave girl and actually give to your slave girl a male offspring, I will give him to Jehovah all the days of his life, and no razor will come upon his head. ’ ”
לא תשכח את אמתך ונתתה לאמתך זרע אנשים, ונתתיו ליהוה כל ימי חייו, ומוֹרָה לא יעלה על ראשו ’ ” (‏ שמואל א ’. א ’: 11‏).