1 Samuel 13:2 (KJV)

Saul reigned one year; and when he had reigned two years over Israel,

Saul chose him three thousand men of Israel; whereof two thousand were with Saul in Michmash and in mount Beth–el, and a thousand were with Jonathan in Gibeah of Benjamin: and the rest of the people he sent every man to his tent.

And Jonathan smote the garrison of the Philistines that was in Geba, and the Philistines heard of it. And Saul blew the trumpet throughout all the land, saying, Let the Hebrews hear.

And all Israel heard say that Saul had smitten a garrison of the Philistines, and that Israel also was had in abomination with the Philistines. And the people were called together after Saul to Gilgal.