Jeremiah 27:6 - Matthew Poole's English Annotations on the Holy Bible

By the former words God gave the prophet authority to assert his dominion, and right to dispose of all creatures; by these he authorizeth him to reveal his will, concerning the disposal of the lands of Edom, Moab, Ammon, Tyre, and Zidon, viz. that he had disposed of them to Nebuchadnezzar the king of Babylon, whom he calleth his servant, because he did the work which he would have him to do; though, as God said of the Assyrian, Isaiah 10:7, he meaned not so, he had nothing less in his thoughts than to obey any command of God; wicked men being God's servants, as the hawk is the prudent falconer's servant, who maketh use of the ravenous quality of the hawk to get game for him. Twice more at least we find Nebuchadnezzar thus called, Jeremiah 25:9, Jeremiah 43:10. God further adds that the beasts should serve him, by which he either means that the cattle which were in the possession of the men of those nations should also come into his power; or that God had also given the horses, and oxen, and other beasts which he should use in his wars for carriages, or conveniency to him, so as they should be really serviceable to him in his conquests of those countries.