21 And Daniel was there until the first year of Cyrus the king.
Daniel 1:21 Cross References - LEB
Daniel 6:28
28 So this Daniel prospered during the kingdom of Darius and during the kingdom of Cyrus the Persian.
Daniel 10:1
1 In the third year of Cyrus the king of the Persians, a word* was revealed to Daniel, who was called by his name Belteshazzar, and the word* was reliable and it concerned a great tribulation,* and he understood the word* and ⌊he received understanding⌋.*