Parallel
2 Chronicles 12:1
Brenton's English Septuagint · Berean Standard Bible
And it came to pass when the kingdom of Roboam was established, and when he had grown strong, [that] he forsook the commandments of the Lord, and all Israel with him.
After Rehoboam had established his sovereignty and royal power, he and all Israel (note: That is, Judah; in 2 Chronicles, Judah is occasionally called Israel, as representative of the true Israel.) with him forsook the Law of the LORD.