1 Samuel 14:18
17 So Saul said to the army that was with him, “Muster the troops and see who is no longer with us.” When they mustered the troops, Jonathan and his armor-bearer were not there. 18 So Saul said to Ahijah, “Bring near the ark of God,” for the ark of God was in that day, and the sons of Israel19. 19 While Saul spoke to the priest, the panic in the Philistines’ camp was becoming greater and greater. So Saul said to the priest, “Withdraw your hand.”
LXX 1 Samuel 14:18
17 And Saul said to the people with him, Number yourselves now, and see who has gone out from you: and they numbered themselves, and behold, Jonathan and his armour-bearer were not found. 18 And Saul said to Achia, Bring the ephod; for he wore the ephod in that day before Israel. 19 And it came to pass while Saul was speaking to the priest, that the sound in the camp of the Philistines continued to increase greatly; and Saul said to the priest, Withdraw thy hands.
Notes and References
"... During the battle of Michmas, Saul intends to inquire of God (1 Samuel 14:18). According to the Masoretic text and Targum Jonathan, he requests the ark of God be brought to him, but according to the Septuagint (followed by Josephus, Antiquities 6:115), he inquires by means of the ephod. The translator of the Septuagint referred to the ephod because the Philistines had taken away the ark. This exegetical problem is addressed not only in the Septuagint but also in rabbinic tradition. Against the thesis of two arks, traced back to R Jehuda ben Laqish, the majority refer to the Headband of Saul, which was necessary for inquiring of the Urim and Thumim ..."
Meiser, Martin The Septuagint and Its Reception: Collected Essays (pp. 70-71) Mohr Siebeck, 2022