I Samuel 20:20-23 (NKJV)
[20] Then I will shoot three arrows to the side, as though I shot at a target;
[21] and there I will send a lad, saying, ‘Go, find the arrows. If I expressly say to the lad, Look, the arrows are on this side of you; get them and come’—then, as the Lord lives, there is safety for you and no harm.
[22] But if I say thus to the young man, Look, the arrows are beyond you—go your way, for the Lord has sent you away.
[23] And as for the matter which you and I have spoken of, indeed the Lord be between you and me forever.”