1 Samuel 14:1-3

One day Jonathan son of Saul said to his young armor-bearer, “Come, let’s go over to the Philistine outpost on the other side.” But he did not tell his father. Saul was staying on the outskirts of Gibeah under a pomegranate tree in Migron. With him were about six hundred men, among whom was Ahijah, who was wearing an ephod. He was a son of Ichabod’s brother Ahitub son of Phinehas, the son of Eli, the LORD’s priest in Shiloh. No one was aware that Jonathan had left.