Isaiah 18:2

(2) That sendeth ambassadors . . .—The words point to the embassies which the Ethiopian king had sent, in the papyrus boats used for the navigation of the Upper Nile, down that river to Hezekiah and other princes, inviting them to join the alliance against Assyria.

Go, ye swift messengers . . .—The interpolated “saying” being omitted, the words that follow are as the prophet’s address to the messengers, as he sends them back to their own people. Instead of “scattered and peeled, “we are to read tall and polished, as describing the physique which had probably impressed itself on Isaiah’s mind. (Comp. the Sabeans as “men of stature” in Isaiah 45:14.) They were terrible then, as they had ever been (i.e., imperious and mighty), a nation that treadeth down its foes. Instead of “meted out and trodden down,” they are a nation of command, command (or, perhaps, “strength, strength”). The rivers are literally the affluents of the Nile that intersect and fertilise (not “spoil”) the hills and valleys of Nubia. Some commentators, however, though with less probability, accept the Authorised version, and refer the words to Israel, as “scattered and plundered,” with its land “spoiled” by the “rivers of invading armies (Isaiah 8:7).