Daniel 7:19

Then I would know the truth of the fourth beast;.... What it represented, what kingdom or monarchy was meant by it; for, by the above answer of the angel, he understood the four beasts signified four kings or kingdoms; the three first he pretty well understood; at least he was not so solicitous about them as about the fourth; and this he was desirous of having a very particular and exact account of; it threatening, by its appearance, a great deal of trouble to the world, and especially to the church of God:which was diverse from all the others; or, "from all them", or "those" , the other three beasts:exceeding dreadful; to other kingdoms and nations:whose teeth were of iron; of these parts of its description, see on Da 7:7,and his nails of brass; this is a new circumstance, not before mentioned, and here added with great propriety: "nails" belonging to a beast of prey, and these said to be of "brass", to denote its strength, cruelty, and voraciousness in tearing its prey, to pieces; and, moreover, to show that this kingdom has somewhat of the nature of the third or Grecian monarchy, said to be of brass in Nebuchadnezzar's dream; some out of that kingdom being taken into the Roman militia, as, Theodoret observes; and soldiers are to a king what nails are to a beast:which devoured, brake in pieces, and stamped the residue with his feet; some kingdoms and provinces were destroyed by it, and the rest were made subject to it; see Da 7:7.