1 Samuel 3:9-10

New American Standard Bible

⁹ And Eli said to Samuel, “Go lie down, and it shall be if He calls you, that you shall say, ‘Speak, Lord, for Your servant is listening.’” So Samuel went and lay down in his place.

¹⁰ Then the Lord came and stood, and called as at the other times: “Samuel! Samuel!” And Samuel said, “Speak, for Your servant is listening.”