that certain saint - Daniel did not know the names of these two holy angels, but saw only that one was speaking to the other.
How long shall be the vision concerning ... daily sacrifice - How long shall the daily sacrifice be suspended?
transgression of desolation - literally, “making desolate,” that is, Antiochus desolating profanation of the temple (Dan 11:31; Dan 12:11). Compare as to Rome and the last Antichrist, Mat 24:15.