It is what is known as the Fourth Book of the Sibylline Oracles.

The language is Greek, the form hexameter verse.

In this poem, the Sibyl, in the guise of a prophetess, tells of the doom of those who resist the will of the one true God, praises the God of Israel, and holds out a beautiful prospect to the faithful.
The book opens with an invocation: Hear, people of proud Asia, Europe, too, How many things by great, loud-sounding mouth, All true and of my own, I prophesy.
No oracle of false Apollo this, Whom vain men call a god, tho' he deceived; But of the mighty God, whom human hands Shaped not like speechless idols cut in stone.
The Sibyl speaks of the true God, to love whom brings blessing.

The ungodly triumph for a while, as Assyria, Media, Phrygia, Greece, and Egypt had triumphed.

Jerusalem will fall, and the Temple perish in flames, but retribution will follow, the earth will be desolated by the divine wrath, the race of men and cities and rivers will be reduced to smoky dust, unless moral amendment comes betimes.