Here, 1. Saul gets information of David's movements and acts offensively. The Ziphites came to him and told him where David now was, in the same place where he was when they formerly betrayed him, Sa1 23:19. Perhaps (though it is not mentioned) Saul had given them intimation, under-hand, that he continued his design against David, and would be glad of their assistance. If not, they were very officious to Saul, aware of what would please him, and very malicious against David, to whom they despaired of ever reconciling themselves, and therefore they stirred up Saul (who needed no such spur) against him, Sa1 26:1. For aught we know, Saul would have continued in the same good mind that he was in (Sa1 24:17), and would not have given David this fresh trouble, if the Ziphites had not put him on. See what need we have to pray to God that, since we have so much of the tinner of corruption in our own hearts, the sparks of temptation may be kept far from us, lest, if they come together, we be set on fire of hell. Saul readily caught at the information, and went down with an army of 3000 men to the place where David hid himself, Sa1 26:2. How soon do unsanctified hearts lose the good impressions which their convictions have made upon them and return with the dog to their vomit!
2. David gets information of Saul's movements and acts defensively. He did not march out to meet and fight him; he sought only his own safety, not Saul's ruin; therefore he abode in the wilderness (Sa1 26:3), putting thereby a great force upon himself, and curbing the bravery of his own spirit by a silent retirement, showing more true valour than he could have done by an irregular resistance. (1.) He had spies who informed him of Saul's descent, that he had come in very deed (Sa1 26:4.); for he would not believe that Saul would deal so basely with him till he had the utmost evidence of it. (2.) He observed with his own eyes how Saul was encamped, Sa1 26:5. He came towards the place where Saul and his men had pitched their tents, so near as to be able, undiscovered, to take a view of their entrenchments, probably in the dusk of the evening.

The Ziphites came - This is the second time that these enemies of David endeavored to throw him into the hands of Saul. See Sa1 23:19.

And the Ziphites came unto Saul to Gibeah,.... Of Benjamin, called sometimes Gibeah of Saul, because it was the place of his birth and residence; hither Saul had returned after his last interview with David; whether, notwithstanding what had passed between him and David, he had privately encouraged the Ziphites to watch David, and give him information of him where he was, and when it was a proper opportunity to seize him; or whether the Ziphites were so officious as of themselves to acquaint him with it, is not certain; the latter is probable, since having attempted to betray David, they might fear, that should he come to the throne, he would remember it, and therefore they might be desirous of having him cut off by the hand of Saul:

saying, doth not David hide himself in the hill of Hachilah, which is before Jeshimon? the same place where he was when the Ziphites before gave information of him, Sa1 23:10; here he might choose to be, supposing that the Ziphites now would not meditate anything against him, since Saul had declared he would be king after him, and had made him swear that he would not cut off his posterity; and as he thought it his wisdom to provide against the worst, knowing the inconstancy of Saul, he might judge this the most proper place of safety, and from whence he could, on occasion, easily retreat into the wilderness; and it may be also, because it was near to Abigail's estate and possessions, which were now a good resource for him.