1 Samuel 20:18-22

18Then Jonathan said to David, “Tomorrow is the New Moon feast. You will be missed, because your seat will be empty. 19The day after tomorrow, toward evening, go to the place where you hid when this trouble began, and wait by the stone Ezel. 20I will shoot three arrows to the side of it, as though I were shooting at a target. 21Then I will send a boy and say, ‘Go, find the arrows.’ If I say to him, ‘Look, the arrows are on this side of you; bring them here,’ then come, because, as surely as the LORD lives, you are safe; there is no danger. 22But if I say to the boy, ‘Look, the arrows are beyond you,’ then you must go, because the LORD has sent you away.