Thy servant heareth, i.e. I am ready to hear what thou speakest, and to do what thou requirest.
Related Commentaries of 1 Samuel 3:9
1 Samuel 3:9
9 Therefore Eli said unto Samuel, Go, lie down: and it shall be, if he call thee, that thou shalt say, Speak, LORD; for thy servant heareth. So Samuel went and lay down in his place.