1 Samuel 3:7-9

Thus did Samuel, before hee knewe the Lord, and before the word of the Lord was reueiled vnto him.

And the Lord called Samuel againe the thirde time: and he arose, and went to Eli, and said, I am here: for thou hast called me. Then Eli perceiued that the Lord had called the childe.

Therefore Eli saide vnto Samuel, Goe and sleepe: and if he call thee, then say, Speake Lord, for thy seruant heareth. So Samuel went, and slept in his place.