Matthew Poole and continuators on Daniel 1:21

21 And Daniel continued even unto the first year of king Cyrus .

i. e. In the Court of Babylon until Cyrus, and then he was in the Persian Court, and he lived in Honour and high employment all that time, yea after Cyrus began to Reign, for chap. 10.1. he had Visions and Revelations, in the third year of Cyrus, he might live longer, for the word until doth not exclude things that follow after, Psal. 110.1. and 112.8.

Marginal references: chap. 6.28.