1 Samuel 1:25-28

And they slew the bullock, and brought the child to Eli. And she said, Oh, my lord, as thy soul liveth, my lord, I am the woman that stood by thee here, praying unto Jehovah. For this child I prayed; and Jehovah hath given me my petition which I asked of him: therefore also I have granted him to Jehovah; as long as he liveth he is granted to Jehovah. And he worshipped Jehovah there.