Thomas Aquinas Commentary Jeremiah 4:13-14

"Behold, he shall come up as clouds, and his chariots [shall be] as the whirlwind: his horses are swifter than eagles. Woe unto us! for we are ruined. O Jerusalem, wash thy heart from wickedness, that thou mayest be saved. How long shall thine evil thoughts lodge within thee?" — Jeremiah 4:13-14 (ASV)

Here, he describes their coming in relation to the end of their march; he makes three points concerning this.

1. First, he describes the condition of the enemy. Regarding their multitude: they are as a cloud that covers the earth and will arise because of the layout of the land. Regarding their violence: they are as the storm, with much tumult. His wheels are like the fury of a storm (Isaiah 5:28). And regarding their swiftness: his horses are swifter than eagles.
2. Second, he discusses the effect of their arrival from the perspective of the people: woe to us. It is as a city which is laid waste (Isaiah 1:8).
3. Third, he advises repentance: wash your heart from wickedness. Wash, and be clean; take away from my eyes the evil of your thoughts (Isaiah 1:16).