Lamentations talks about the Babylonians.
The third of the Prophetical Books, and the twenty-fifth book of the Bible, is the Book of Lamentations. It is the second book to be written by the prophet Jeremiah, and, where the first book looks forward, warning of the coming destruction of Jerusalem, Lamentations looks back in mourning at the fate of the city and its people. It contains five poems which describe the destruction of Jerusalem by the Babylonians and grieve for its loss. But the Book of Lamentations also reminds us of God's faithfulness and that He will not abandon His chosen people. God's mercies remain for those who answer His call.
"Thou hast covered with anger, and persecuted us:
thou hast slain, thou hast not pitied.
Thou hast covered thyself with a cloud,
that our prayer should not pass through.
Thou hast made us as the offscouring
and refuse in the midst of the people."
Although it seems that God has forgotten His people, Jeremiah knows that He will show mercy on those in exile