1 Samuel 1:11, 24-28

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.”

After he was weaned, she took the boy with her, young as he was, along with a three-year-old bull, an ephah of flour and a skin of wine, and brought him to the house of the LORD at Shiloh. When the bull had been sacrificed, they brought the boy to Eli, and she said to him, “Pardon me, my lord. As surely as you live, I am the woman who stood here beside you praying to the LORD. I prayed for this child, and the LORD has granted me what I asked of him. So now I give him to the LORD. For his whole life he will be given over to the LORD.” And he worshiped the LORD there.