1 Samuel 23 (KJV)

9 And David knew that Saul secretly practised mischief (evil) against him; and he said to Abiathar the priest, Bring hither the ephod (elaborate garment worn by the high priest, and upon which the Hoshen, or breastplate containing Urim and Thummim, rested.  Also, an ephod was an artifact and an object to be revered in ancient Israelite culture, and was closely connected with oracular practices and priestly ritual.).