This great terror drew so many forth; which is not so strange to him that knows what none deny, that the land of Canaan contained vast numbers of people in a little compass. The men of Judah are numbered apart to their honour, to show how readily they, to whom the kingdom was promised, Genesis 49:10, submitted to their king, though of another and far meaner tribe; and how willing they were to hazard themselves for their brethren's rescue, although they might have excused themselves from the necessity of defending their own country from their dangerous neighbours the Philistines.
Related Commentaries of 1 Samuel 11:8
1 Samuel 11:8
8 And when he numbered them in Bezek, the children of Israel were three hundred thousand, and the men of Judah thirty thousand.