Charles Ellicott Commentary 2 Chronicles 11:3

"Speak unto Rehoboam the son of Solomon, king of Judah, and to all Israel in Judah and Benjamin, saying," — 2 Chronicles 11:3 (ASV)

King of Judah. —By this significant expression, accomplished facts receive at the outset the seal of Divine assent.

All Israel in Judah and Benjamin.

—The Book of Kings has “all the house of Judah and Benjamin, and the remnant of the people;” where the second phrase seems to define the first, for the house of Judah and Benjamin was the remnant of Israel that continued loyal to David. In that case, the chronicler’s phrase is a mere abbreviation, denoting whatever of Israel was comprised in the two faithful tribes (Compare 2 Chronicles 10:17).

However, there may be a hint that Judah and Benjamin were the true Israel, and that the apostate North had forfeited its right to that honorable name. Others suppose this refers to members of Northern tribes dwelling in the territory of Judah and Benjamin.

The Syriac version reads, “to Rehoboam ... and to the house of Benjamin, and to all Israel, and to the remnant of the people.” The Septuagint simply has, “to all Judah and Benjamin.”