I Samuel 3:1-4

Now the boy Samuel ministered to the LORD before Eli. And the word of the LORD was rare in those days; there was no widespread revelation. And it came to pass at that time, while Eli was lying down in his place, and when his eyes had begun to grow so dim that he could not see, and before the lamp of God went out in the tabernacle of the LORD where the ark of God was, and while Samuel was lying down, that the LORD called Samuel. And he answered, “Here I am!”