King James Version
And it came to pass, when Rehoboam had established the kingdom, and had strengthened himself, he forsook the law of the LORD, and all Israel with him.English Standard Version
When the rule of Rehoboam was established and he was strong, he abandoned the law of the LORD, and all Israel with him.New International Version
After Rehoboam's position as king was established and he had become strong, he and all Israel with him abandoned the law of the LORD.