2. Samuel 17:18

"And a lad (servant) saw them, and told Absalom." Absalom had most likely set spies to watch the priests and their sons. But the two sons who had noticed the spy hurried into the house of a man at Bahurim, who had a well (or cistern that was dry at the time) in his court, and went down into the well.

The contest between David and Absalom is now hasting towards a crisis. It must be determined by the sword, and preparation is made accordingly in this chapter. I. Absalom calls a council of war, in which Ahithophel urges despatch (Sa2 17:1-4), but Hushai recommends deliberation (Sa2 17:5-13); and Hushai's counsel is agreed to (Sa2 17:14), for vexation at which Ahithophel hangs himself (Sa2 17:23). II. Secret intelligence is sent to David (but with much difficultly) of their proceedings (Sa2 17:15-21). III. David marches to the other side Jordan (Sa2 17:22-24), and there his camp is victualled by some of his friends in that country (Sa2 17:27-29). IV. Absalom and his forces march after him into the land of Gilead on the other side Jordan (Sa2 17:25, Sa2 17:26). There we shall, in the next chapter, find the cause decided by a battle: hitherto, every thing has looked black upon poor David, but now the day of his deliverance begins to dawn.

17:18-20 Bahurim was the home of Shimei, the pro-Saul Benjaminite (16:5; 19:16). Shimei’s cursing of David at Bahurim reflected David’s decline, while the escape of Ahimaaz and Jonathan pictured the hope of David’s resurgence.