1 Samuel 14:1-3

Now it came to pass upon a day, that Jonathan the son of Saul said unto the young man that bare his armour, Come, and let us go over to the Philistines' garrison, that is on the other side. But he told not his father. And Saul tarried in the uttermost part of Gibeah under a pomegranate tree which is in Migron: and the people that were with him were about six hundred men; and Ahiah, the son of Ahitub, I-chabod's brother, the son of Phinehas, the son of Eli, the LORD's priest in Shiloh, wearing an ephod. And the people knew not that Jonathan was gone.