1 Samuel 20:18-22

Then Jonathan said to him, “Tomorrow is the new moon, and you will be missed since your seat will be empty.

When you have stayed for three days, you shall go down quickly and come to the place where you hid yourself on that eventful day, and you shall remain beside the stone Ezel.

And I will shoot three arrows to the side, as though I shot at a target.

Then behold, I will send the boy, telling him, ‘Go, find the arrows.’ If I specifically say to the boy, ‘Behold, the arrows are on this side of you, get them,’ then come, because it is safe for you and there is nothing to harm you, as the Lord lives.

But if I say to the youth, ‘Behold, the arrows are beyond you,’ go, because the Lord has sent you away.