If a man ¹  makes a vow ²  to the Lord or takes an oath ³  of binding obligation on himself, ⁴  he must not break his word, but must do whatever he has promised. ⁵ 

After two months she returned to her father, and he did to her as he had vowed. She died a virgin. ¹  Her tragic death gave rise to a custom in Israel. ² 

She made a vow saying, “O Lord of hosts, if you will look with compassion ¹  on the suffering of your female servant, ²  remembering me and not forgetting your servant, and give a male child ³  to your servant, then I will dedicate him to the Lord all the days of his life. His hair will never be cut.” ⁴