Albert Barnes Commentary Isaiah 13:6

"Wail ye; for the day of Jehovah is at hand; as destruction from the Almighty shall it come." — Isaiah 13:6 (ASV)

Howl ye - You inhabitants of Babylon, in view of the approaching destruction.

The day of the Lord - The time when Yahweh will inflict vengeance on you draws near (see the note at Isaiah 2:12).

As a destruction from the Almighty - Not as a desolation from man, but as destruction sent from Him who has all power in heaven and on earth. Destruction meditated by man might be resisted; but destruction that should come from the Almighty must be final and irresistible.

The word ‘Almighty’—שׁדי shadday—one of the names given to God in the Scriptures, properly denotes “one who is mighty,” or who has all power, and is correctly rendered Almighty, or Omnipotent (Genesis 17:1; Genesis 28:3; Genesis 48:3; Exodus 6:3; Ruth 1:20; Job 5:17; Job 6:4, 14; Job 8:3, 5; Job 11:7; Job 13:4; Job 15:25).

In the Hebrew here, there is a paronomasia or “pun”—a figure of speech quite common in the Scriptures, which cannot be retained in the translation—‘It shall come as a destruction (כשׁד keshod) from the Almighty (משׁדי mîshadday).’