1 Samuel 14:1-3

1Then one day Jonathan son of Saul said to his armor bearer, “Come on, let’s go over to the Philistine garrison that is opposite us.” But he did not let his father know.

2Now Saul was sitting under a pomegranate tree in Migron, on the outskirts of Gibeah. The army that was with him numbered about six hundred men.

3Now Ahijah was carrying an ephod. He was the son of Ahitub, who was the brother of Ichabod and a son of Phineas, son of Eli, the priest of the Lord in Shiloh. The army was unaware that Jonathan had left.