Isaiah 21:2 - Joseph Benson’s Commentary on the Old and New Testaments

A grievous vision is declared unto me A vision or prophecy, predicting dreadful calamities about to fall upon Babylon. The treacherous dealer, &c. In these words the prophet either describes the sin of the Chaldeans, for which God would send the following judgment upon them, namely, they persisted in the practice of treachery and rapine, to which they had been so long accustomed; or he speaks of the Medes and Persians, and represents them as paying the Babylonians in their own coin, and using the same treachery and violence toward them which they had used toward others. The words may be properly rendered, Thou, O Elam, that dealest treacherously with the treacherous dealer, or, that oppressest the oppressor, and spoilest the spoiler, go up, besiege, &c. Babylon had long oppressed and ravaged other countries: and it was now her turn to be oppressed and ravaged. Elam was an eminent province of Persia, bordering upon Media, and is here put for Persia in general. God here gives the Medes and Persians their commission to go up and take Babylon, and thereby to put an end to the sighs and groans of the captive Jews, and of other nations held in bondage, and oppressed by that tyrannical and cruel empire.