1 Samuel 14:1-3

One day Jonathan said to his armor bearer, “Come on, let’s go over to where the Philistines have their outpost.” But Jonathan did not tell his father what he was doing. Meanwhile, Saul and his 600 men were camped on the outskirts of Gibeah, around the pomegranate tree at Migron. Among Saul’s men was Ahijah the priest, who was wearing the ephod, the priestly vest. Ahijah was the son of Ichabod’s brother Ahitub, son of Phinehas, son of Eli, the priest of the LORD who had served at Shiloh. No one realized that Jonathan had left the Israelite camp.