Adam Clarke on 1 Samuel 11:8

The children of Israel were three hundred thousand, and the men of Judah thirty thousand - This was a vast army, but the Septuagint make it even more: "All the men of Israel were ἑξακοσιας χιλιαδας, Six Hundred thousand; and the men of Judah ἑβδομηκοντα χιλιαδας, Seventy thousand." Josephus goes yet higher with the number of the Israelites: "He found the number of those whom he had gathered together to be ἑβδομηκοντα μυριαδας Seven Hundred thousand." Those of the tribe of Judah he makes seventy thousand, with the Septuagint. These numbers are not all right; and I suspect even the Hebrew text to be exaggerated, by the mistake or design of some ancient scribe.