I saw.

Daniel 7:2, 13
Daniel declared: "In my vision in the night I looked, and suddenly the four winds of heaven were churning up the Great Sea. . . .

a fourth.

Daniel 7:19, 23
Then I wanted to know the true meaning of the fourth beast, which was different from all the others--extremely terrifying--with iron teeth and bronze claws, devouring, crushing, and trampling underfoot whatever was left. . . .

Daniel 2:40
Finally, there will be a fourth kingdom as strong as iron; for iron shatters and crushes all things, and like iron that crushes all things, it will shatter and crush all the others.

Daniel 8:10
It grew as high as the host of heaven, and it cast down some of the host and some of the stars to the earth, and trampled them.

2 Samuel 22:43
I ground them as the dust of the earth; I crushed and trampled them like mud in the streets.

and it had ten.

Daniel 7:24
And the ten horns are ten kings who will rise from this kingdom. After them another king, different from the earlier ones, will rise and subdue three kings.

Daniel 2:41, 42
And just as you saw that the feet and toes were made partly of fired clay and partly of iron, so this will be a divided kingdom, yet some of the strength of iron will be in it--just as you saw the iron mixed with clay. . . .

Revelation 12:3
Then another sign appeared in heaven: a huge red dragon with seven heads, ten horns, and seven royal crowns on his heads.

Revelation 13:1
Then I saw a beast with ten horns and seven heads rising out of the sea. There were ten royal crowns on its horns and blasphemous names on its heads.

Revelation 17:7, 12
"Why are you astonished?" said the angel. "I will tell you the mystery of the woman and of the beast that carries her, which has the seven heads and ten horns. . . .