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.
David’s reason for entering Saul’s camp was not to kill him but to teach him a lesson. By taking Saul’s spear, David would teach the king that he had the power of death, but chose to spare Saul’s life rather than take it. This symbolic act also communicated that the right to rule would be David’s eventually. By taking his water jug, a life-giving vessel since life in the Judean wilderness depended on drinking water, David taught him that he had the power to take Saul’s life. Perhaps the jug of water also symbolized that refreshment and blessing would also be David’s portion from the Lord. It was really the Lord who defended David by making Saul and all of his men sleep soundly (1 Samuel 26:12).