1 Samuel 23:2, 9-12

So David inquired of the LORD, saying, “Shall I go and attack these Philistines?” And the Lord said to David, “Go and attack the Philistines and save Keilah.”

But David knew that Saul was plotting evil against him; and he said to Abiathar the priest, “Bring the ephod here.” Then David said, “O LORD, the God of Israel, Your servant has heard for certain that Saul intends to come to Keilah, to destroy the city on my account. Will the men of Keilah hand me over to him? Will Saul come down just as Your servant has heard? O LORD, God of Israel, I pray, tell Your servant.” And the LORD said, “He will come down.” Then David asked, “Will the men of Keilah surrender me and my men to Saul?” The LORD said, “They will surrender you.”