See therefore, and take knowledge of all the lurking-places where he hides himself, and come you again to me of a certainty, and I will go with you: and it shall happen, if he be in the land, that I will search him out among all the thousands of Judah.
Evidently the Ziphites thought that they would be better off if they informed Saul of David’s presence in their area than if the king discovered that he was there. He might have blamed them for sheltering David and taken revenge on them as he had on the people of Nob.