Charles Ellicott Commentary 2 Chronicles 11:10

"and Zorah, and Aijalon, and Hebron, which are in Judah and in Benjamin, fortified cities." — 2 Chronicles 11:10 (ASV)

Zorah. — Sur’ah; a ruin on the ridge north of the Wady-es-Surar. The birthplace of Samson.

Aijalon. — Yalo, north of Sur’ah, four leagues west of Gibeon. Zorah and Aijalon, or Ajalon, may have become Benjamite cities at the epoch of the migration of Dan (Judges 18:0). (Joshua 10:12.) Of the fifteen fortified cities enumerated here, these two lay farthest north.

Hebron. — El Khalil (Genesis 23:2).

Which are in Judah and in Benjamin. — This refers to the entire list.

Fenced cities. — ‘ Arê m e tsûrôth (“cities of ramparts,” or “strongholds”); a phrase peculiar to the chronicler. (Compare 2 Chronicles 12:4.) “The fifteen cities [excluding Zorah and Ajalon] were on the south and west of Jerusalem. Hence Rehoboam appears to have been more afraid of an attack from the south and west—that is, from the Egyptians—than of a war with the northern kingdom.” (Bertheau.)