So David took the spear and the jar of water from Saul's head; and they got them away: and no man saw it, nor knew it, neither did any awake; for they were all asleep, because a deep sleep from Yahweh was fallen on them.
So David is sort of chiding Abner the chief general of Saul, saying, "Hey you know your job is to guard the king, and you aren't doing a good job. You ought to be put to death. Someone came in to destroy the king, and you were just sound asleep. Look where the king's spear is, and the cruse of water."