It happened, when Abiathar the son of Ahimelech fled to David to Keilah, that he came down with an ephod in his hand.
There seems to be some confusion in  1 Samuel 23:10-12 regarding the inquiring of the Lord by means of the Urim and Thummim.  We do not believe that any part of these verses needs to be omitted or moved.  Keil has an excellent explanation of them just as they appear in the text.