Albert Barnes Commentary 1 Samuel 8:2

"Now the name of his first-born was Joel; and the name of his second, Abijah: they were judges in Beer-sheba." — 1 Samuel 8:2 (ASV)

The mention of Beersheba, on the extreme southern frontier of Judah, as the place where Samuel’s sons judged Israel is remarkable. It was probably due to the recovery of territory from the usurpation of the Philistines (1 Samuel 7:14).