1 Samuel 3:7-9

King James Version

⁷ Now Samuel did not yet know the Lord, neither was the word of the Lord yet revealed unto him.

⁸ And the Lord called Samuel again the third time. And he arose and went to Eli, and said, Here am I; for thou didst call me. And Eli perceived that the Lord had called the child.

⁹ Therefore Eli said unto Samuel, Go, lie down: and it shall be, if he call thee, that thou shalt say, Speak, Lord; for thy servant heareth. So Samuel went and lay down in his place.