Jamieson, Fausset and Brown on Isaiah 37:25

25. digged, and drunk water--In 2Ki 19:24, it is "strange waters." I have marched into foreign lands where I had to dig wells for the supply of my armies; even the natural destitution of water there did not impede my march.

rivers of ... besieged places--rather, "the streams (artificial canals from the Nile) of Egypt." "With the sole of my foot," expresses that as soon as his vast armies marched into a region, the streams were drunk up by them; or rather, that the rivers proved no obstruction to the onward march of his armies. So Is 19:4-6, referring to Egypt, "the river--brooks of defense--shall be dried up." Horsley, translates the Hebrew for "besieged places," "rocks."