isaiah 2:7 Their land also is full of silver and gold, neither is there any end of their treasures; their land is also full of horses, neither is there any end of their chariots: - Free Bible Online

      7. gold--forbidden to be heaped together (De 17:17). Solomon disobeyed (1Ki 10:21, 27).
      horses . . . chariots--forbidden (De 17:16). But Solomon disobeyed (1Ki 20:26). Horses could be used effectively for war in the plains of Egypt; not so in the hilly Judea. God designed there should be as wide as possible a distinction between Israel and the Egyptians. He would have His people wholly dependent on Him, rather than on the ordinary means of warfare (Ps 20:7). Also horses were connected with idolatry (2Ki 23:11); hence His objection: so the transition to "idols" (Isa 2:8) is natural.

JFB.