Daniel 8:3-4

3Then 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.

4I saw the ram (Medo-Persia) charging westward and northward and southward; no beast could stand before him, nor was there anyone who could rescue [anything] from his power, but he did as he pleased and magnified himself.