See 1 Kings 14:25 note.

He took the fenced cities. —Those very cities which Rehoboam had fortified as bulwarks against Egypt ([Reference 2 Chroni…

With twelve hundred chariots, and threescore thousand horsemen: and the people were without number that came with him out of Egypt; the Lubims,…

And he took the fenced cities which pertained to Judah
Which Rehoboam had lately built, and placed his sons in them,…

When Rehoboam was so strong that he supposed he had nothing to fear from Jeroboam, he cast off his outward profession of godliness. It is very comm…