1st Samuel 3:5

2 And at that time, when Eli was resting in his place, (now his eyes were becoming clouded so that he was not able to see,)

3 And the light of God was still burning, while Samuel was sleeping in the Temple of the Lord where the ark of God was,

4 The voice of the Lord said Samuel's name; and he said, Here am I.

5 And running to Eli he said, Here am I, for you said my name. And Eli said, I did not say your name; go to your rest again. So he went back to his bed.

6 And again the Lord said, Samuel. And Samuel got up and went to Eli and said, Here am I; for you certainly said my name. But he said in answer, I said nothing, my son; go to your rest again.

7 Now at that time Samuel had no knowledge of the Lord, and the revelation of the word of the Lord had not come to him.

8 And for the third time the Lord said Samuel's name. And he got up and went to Eli and said, Here am I; for you certainly said my name. Then it was clear to Eli that the voice which had said the child's name was the Lord's.