1 Samuel 1:11, 22, 27-28

She made a vow and said, “O LORD of hosts, if You will indeed look on the affliction of Your maidservant and remember me, and not forget Your maidservant, but will give Your maidservant a son, then I will give him to the LORD all the days of his life, and a razor shall never come on his head.”

But Hannah did not go up, for she said to her husband, “I will not go up until the child is weaned; then I will bring him, that he may appear before the LORD and stay there forever.”

For this boy I prayed, and the LORD has given me my petition which I asked of Him. So I have also dedicated him to the LORD; as long as he lives he is dedicated to the LORD.” And he worshiped the LORD there.