2 Samuel 5:23

“Did I just begin to ask of God on his behalf today? Far be it from me! Do not let the king impute anything to his servant or to any of the household of my father, for your servant knows nothing small or great of this whole affair.”

So David asked of Yahweh, saying, “Shall I go and strike these Philistines?” And Yahweh said to David, “Go and strike the Philistines and save Keilah.”

from Aram, Moab, the sons of Ammon, the Philistines, Amalek, and from the spoil of Hadadezer, son of Rehob, king of Zobah.

And the Philistines were at war again with Israel, so David went down and his servants with him; and as they fought against the Philistines, David became weary.