Charles Ellicott Commentary Isaiah 13:3

"I have commanded my consecrated ones, yea, I have called my mighty men for mine anger, even my proudly exulting ones." — Isaiah 13:3 (ASV)

I have commanded my sanctified ones ... —The word is applied even to the fierce tribes of the future destroyers, as being appointed, or consecrated, by Jehovah for that special work. The thought and the words (there translated “prepare”) appear in Jeremiah 6:4; Jeremiah 22:7; Jeremiah 51:27. So in the later prophecies Cyrus appears as “the anointed” of the Lord (Isaiah 45:1).

Even them that rejoice in my highness. —In Zephaniah 3:11 the same phrase occurs in a bad sense. Here, apparently, it denotes the proud consciousness of the invaders that they are doing God’s work.