1 Samuel 3:4-6
3:4 The Lord called to Samuel, and he replied, “Here I am!”
3:5 Then he ran to Eli and said, “Here I am, for you called me.” But Eli said, “I didn’t call you. Go back and lie down.” So he went back and lay down.
3:6 The Lord again called, “Samuel!” So Samuel got up and went to Eli and said, “Here I am, for you called me.” But Eli said, “I didn’t call you, my son. Go back and lie down.”
1 Samuel 3:8
3:8 Then the Lord called Samuel a third time. So he got up and went to Eli and said, “Here I am, for you called me!” Eli then realized that it was the Lord who was calling the boy.