John Trapp on Daniel 10:4

Ver. 4. And on the four and twentieth of the firſt moneth] The day is thus noted, becauſe the matters here revealed were moſt memorable.

As I was by the ſide of the great river] Meditating, likely, (becauſe the City was full of noiſe and tumult) and praying, as Acts 16.13. Broughton giveth this reaſon, becauſe Seleucus Nicator, founder of the Seleucida, much ſpoken of in the enſuing viſion, built his chief City upon this river.

Which is Hiddekel] i. e. Sharp-ſwift: called alſo Tigris from the ſwifteſt of all beaſts the Tiger: Plin. l. 6. c. 7. but Curtius and Pliny ſay that Tigris in the Median language ſignifieth an Arrow. Here Daniel was perſonally preſent, and not viſionally only: See ver. 7.