en_tn/isa/19/05.md

The waters of the sea will dry up, and the river will dry up and become empty

Egyptians referred to the Nile River as "the sea." AT: "The Nile River will completely dry up." (See: rc://en/ta/man/translate/figs-doublet)

the reeds and flags will wither away

"The plants along the river will die"