1 Samuel 14:1-3

One day Jonathan the son of Saul said to his young armor bearer, “Come, let us go over to the Philistine garrison on the other side.” But he did not tell his father. Saul was staying in the outskirts of Gibeah under a pomegranate tree in Migron; and with him were about six hundred men, and Ahijah the son of Ichabod’s brother Ahitub the son of Phinehas, the son of Eli, the LORD’S priest at Shiloh, was wearing the ephod. And the people did not know that Jonathan had gone.