1 Samuel 23:7-9

7When it was reported to Saul that David had gone to Keilah, he said, “God has handed him over to me, for he has trapped himself by entering a town with barred gates.”

8Then Saul summoned all the troops to go to war at Keilah and besiege David and his men.

9When David learned that Saul was plotting evil against him, he said to the priest Abiathar, “Bring the ephod.”