20 The ram which thou sawest that had the horns is the king of the Medes and Persians.
Daniel 8:20 Cross References - Brenton
Daniel 8:3
3 And I lifted up mine eyes, and saw, and, behold, a ram standing in front of the Ubal; and he had high horns; and one was higher than the other, and the high one came up last.
Daniel 11:1-2
1 And I in the first year of Cyrus stood to strengthen and confirm him.
2 And now I will tell thee the truth. Behold, there shall yet rise up three kings in Persia: and the fourth shall be very far richer than all: and after that he is master of his wealth, he shall rise up against all the kingdoms of the Greeks.