1 Samuel 20:18-22

18Then Jonathan said to David, “Tomorrow is the New Moon, and you will be missed, because your seat will be empty. 19When you have stayed three days, hurry down to the place you hid on the day this trouble began, and remain beside the stone Ezel.1 20I will shoot three arrows to the side of it, as if I were aiming at a target. 21Then I will send a boy and say, ‘Go, find the arrows!’ Now, if I expressly say to him, ‘Look, the arrows are on this side of you; bring them,’ then come, because as surely as the LORD lives, it is safe for you, and there is no danger. 22But if I say to the young man, ‘Look, the arrows are beyond you,’ then you must go, for the LORD has sent you away.