'Horns' in the Bible

After this I kept looking in the night visions, and behold, [I saw] a fourth beast (the Roman Empire), terrible and extremely strong; and it had huge iron teeth. It devoured and crushed and trampled down what was left with its feet. It was different from all the beasts that came before it, and it had ten horns (ten kings).

While I was considering the horns, behold, there came up among them another horn, a little one, and three of the first horns were pulled up by the roots before it; and behold, in this horn were eyes like the eyes of a man and a mouth boasting of great things.

and the meaning of the ten horns (kings) that were on its head and the other horn which came up later, and before which three of the horns fell, specifically, that horn which had eyes and a mouth that boasted great things and which looked larger than the others.

As for the ten horns, out of this kingdom ten kings will arise; and another will arise after them, and he will be different from the former ones, and he will subdue three kings.

Then I raised my eyes and looked, and behold, there in front of the canal stood a [lone] ram (the Medo-Persian Empire) which had two horns. The two horns were high, but one (Persia) was higher than the other (Media), and the higher one came up last.

He came up to the ram that had the two horns, which I had seen standing in front of the canal, and charged at him in [the fury of] his power and wrath.

[In my vision] I saw him come close to the ram (Medo-Persia), and he was filled with rage toward him; and the goat (Greece) struck the ram and shattered his two horns, and the ram had no strength to stand before him. So the goat threw him to the ground and trampled on him, and there was no one who could rescue the ram from his power.

Then the male goat magnified himself exceedingly, and when he was [young and] strong, the great horn (Alexander) was [suddenly] broken; and in its place there came up four prominent horns [among whom the kingdom was divided, one] toward [each of] the four winds of heaven.

The ram which you saw with the two horns represents the kings of Media and Persia.