# was greatly upset for a brief time, and his thoughts alarmed him

"did not say anything for a brief time because he was very worried about the meaning of the dream" 

# may the dream be for those who hate you; may its interpretation be for your enemies

Daniel is expressing his wish that the dream was not about Nebuchadnezzar, even though he knew that it really was about the king.

# the dream ... its interpretation

"will interpret the king's dream to him" or "will reveal what the king's dream means"