Distraught over being childless Hannah promised God what?

ANSWER

grant me a child and I will give him back to the LORD forever

1st Samuel 1 :

10 In her deep anguish Hannah prayed to the LORD, weeping bitterly. 11 And she made a vow, saying, “LORD Almighty, if you will only look on your servant’s misery and remember me, and not forget your servant but give her a son, then I will give him to the LORD for all the days of his life, and no razor will ever be used on his head.”
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