Woe to the (a) land shadowing with wings, which [is] beyond the rivers of Cush:
(a) He means that part of Ethiopia which lies toward the sea, which was so full of ships that the sails (which he compares to wings) seemed to shadow the sea.
Related Commentaries of Isaiah 18:1
Isaiah 18:1
1 Woe to the land shadowing with wings, which is beyond the rivers of Ethiopia: