1 Samuel 20:18 KJV

16So Jonathan made a covenant with the house of David, saying, Let the LORD even require it at the hand of David’s enemies.

17And Jonathan caused David to swear again, because he loved him: for he loved him as he loved his own soul.

18Then Jonathan said to David, To morrow is the new moon: and thou shalt be missed, because thy seat will be empty.

19And when thou hast stayed three days, then thou shalt go down quickly, and come to the place where thou didst hide thyself when the business was in hand, and shalt remain by the stone Ezel.

20And I will shoot three arrows on the side thereof, as though I shot at a mark.