1 Samuel 3:7-9 NLT

7 Samuel did not yet know the because he had never had a message from the before.
8 So the called a third time, and once more Samuel got up and went to Eli. “Here I am. Did you call me?” Then Eli realized it was the who was calling the boy.
9 So he said to Samuel, “Go and lie down again, and if someone calls again, say, ‘Speak, , your servant is listening.’” So Samuel went back to bed.