the fourth
ZEFANIABIBLE_BIBLE_BOOK_NAME_27 7:7
"While I was watching in the night visions, a fourth beast appeared, frightening and dreadful, and incredibly strong, with large iron teeth. It devoured and crushed, and it trampled with its feet whatever was left. It was different from all the beasts before it, and it had 10 horns.
ZEFANIABIBLE_BIBLE_BOOK_NAME_27 2:40-43
40
A fourth kingdom will be as strong as iron; for iron crushes and shatters everything, and like iron that smashes, it will crush and smash all the others.
41
You saw the feet and toes, partly of a potter's fired clay and partly of iron-- it will be a divided kingdom, though some of the strength of iron will be in it. You saw the iron mixed with clay,
42
and that the toes of the feet were part iron and part fired clay-- part of the kingdom will be strong, and part will be brittle.
43
You saw the iron mixed with clay-- the peoples will mix with one another but will not hold together, just as iron does not mix with fired clay.