1 Samuel 1:19-20

The Lord remembered her Manifested his remembrance of her by the effect. She called his name Samuel That is, asked of God. Saying, Because I have asked him of the Lord This was the reason of the name; and she gave it him, that he, as well as she, might keep in mind that he was solemnly dedicated to the Lord, from whom he had been obtained by prayer, and that, remembering how God had evidently heard prayer in this instance, they might the more readily and confidently have recourse to him in all trials and troubles, and put their trust in him.