Jonathan said, “Far be it from you! For if I in fact learn that my father has decided to inflict harm on you, would I not inform you?”

So look, and learn about all the hiding places where he keeps himself hidden, and return to me with certainty, and I will go with you; and if he is in the land, I will search him out among all the thousands of Judah.”

David sent out spies, and he learned that Saul was definitely coming.

David said to Achish, “Very well, you will learn what your servant can do.” So Achish said to David, “Then I will assuredly make you my bodyguard for life!”