1 Samuel 3:9

3:9 So Eli said to Samuel, “Go back and lie down. When he calls you, say, “Speak, Lord, for your servant is listening.” So Samuel went back and lay down in his place.

1 Samuel 29:8

29:8 But David said to Achish, “What have I done? What have you found in your servant from the day that I first came into your presence until the present time, that I shouldn’t go and fight the enemies of my lord the king?”