John Gill Commentary Ezekiel 32:6

"I will also water with thy blood the land wherein thou swimmest, even to the mountains; and the watercourses shall be full of thee." — Ezekiel 32:6 (ASV)

And I will also water with your blood the land wherewith you
swimmest

Where he resided, over which he ruled; alluding to his being compared to a fish, a whale, or a crocodile; and which land abounded with all good things, and he with them; instead of being watered with the waters of the Nile, by which it became fruitful, it should now be flooded with the blood of his army:

even to the mountains ; an hyperbolical expression, signifying the vast quantity of blood that should be shed; see the like in (Revelation 14:20) :

and the rivers shall be full of them ; of the carcasses of his army, and of the blood of them; they should lie about everywhere, on mountains and valleys, on the land and in the rivers; and which should now be turned into blood, as the rivers of Egypt of old were; and which figure is used to express the destruction of the antichristian states; see (Exodus 7:20) (Revelation 16:3Revelation 16:4) .