Albert Barnes Commentary 2 Chronicles 8:2

"that the cities which Huram had given to Solomon, Solomon built them, and caused the children of Israel to dwell there." — 2 Chronicles 8:2 (ASV)

The cities which Huram had restored to Solomon - These cities had not been mentioned previously by the writer of Chronicles, who, however, seems to assume his readers already know that Hiram had given them to Solomon. See 1 Kings 9:11–13.