Abiathar. He had the ephod, with David. Zadok, who was with Saul, had it not.
Related Commentaries of 1 Samuel 30:7
1 Samuel 30:7
7 And David said to Abiathar the priest, Ahimelech's son, I pray thee, bring me hither the ephod. And Abiathar brought thither the ephod to David.