1 Samuel 3:7–10 (Wordstudy KJV):

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.,,
10 And the Lord came,, and stood,, and called, as at other times,,/, Samuel, Samuel. Then Samuel answered,, Speak; for thy servant, heareth.