1 Samuel 23:22-23

22Go now, be very persistent and investigate, and see where his haunt is and who has seen him there; for I am told he is very cunning.

23So look, and take note of all the places where he hides and come back to me with the established facts, then I will go with you. If he is [anywhere] in the land, I will search him out among all the thousands of Judah.”