The word "holiness" here may refer to God's holy temple. Possible meanings are 1) “the mountain where God's holy temple is” or 2) “God's holy mountain." (See: [[rc://en/ta/man/translate/figs-metonymy]])
## in the vision at the first ##
This may refer to the first vision that Daniel had while he was awake. AT: "in the previous vision" or "in the vision I saw before" or "in a vision before"
## at the time of the evening sacrifice ##
The Jewish people sacrificed to God each evening just before the sun goes down.