איוב יד:יא פירוש: רש״י

As the waters fail from the sea From the place whence the river comes and emerges, from its source that comes to it from the sea. [Alternative explanation of Rashi: From the place whence the river comes, and they went away from its source (from) which (the water) comes to it.]

and the river that comes from there is drained dry forever. So does a man lie down and not rise.