1 Samuel 23:4, 6, 9-12

Then David enquired of the LORD yet again. And the LORD answered him and said, Arise, go down to Keilah; for I will deliver the Philistines into thine hand.

And it came to pass, when Abiathar the son of Ahimelech fled to David to Keilah, that he came down with an ephod in his hand.

And David knew that Saul secretly practised mischief against him; and he said to Abiathar the priest, Bring hither the ephod. Then said David, O LORD God of Israel, thy servant hath certainly heard that Saul seeketh to come to Keilah, to destroy the city for my sake. Will the men of Keilah deliver me up into his hand? will Saul come down, as thy servant hath heard? O LORD God of Israel, I beseech thee, tell thy servant. And the LORD said, He will come down. Then said David, Will the men of Keilah deliver me and my men into the hand of Saul? And the LORD said, They will deliver thee up.