Was he in Shushan at the time?
Ibn Ezra citing Yefes: He saw in the Nevu'ah that he was in Shushan, i.e. Malchus Paras 1 . From there came the destroyer of Malchus Belshatzar. It was as if he was by the Ulai river, just like Yechezkel by the Kevar river.
Ibn Ezra: It is possible that he went to Shushan, and returned to Bavel before Belshatzar was killed.
Ibn Ezra: He explained so, for Daniel was in Bavel when Belshatzar was killed.
Why is "va'Er'eh" repeated, and a third time in the coming verse?
Malbim: He saw three future matters that were not yet in existence. (a) He saw that Shushan was the capitol. It was not yet the capitol in Belshatzar's 1 third year. This was only after Paras was aggrandized. (b) Malchei Paras dug the Ulai river only after Paras was aggrandized. It is known that Malchei Bavel did similarly.
We corrected an obvious printing mistake. (PF)
What is the meaning of "Al Uval Ulai"?
Rashi: By the Ulai river.
Ibn Ezra: Uval is like Yuval ? "v'Al Yuval Yeshalach Sharashav", "ka'Aravim Al Yivlei Mayim." Sometimes Aleph is in place of Yud.
