3 occurrences in 3 dictionaries
Reference: NIMRIM
Morish
Nim'rim Waters of.
Streams of Moab. Isa 15:6; Jer 48:34. Perhaps connected with the springs near Nimrah, or near the brook Zered toward the south end of the Dead Sea.
Smith
Nim'rim
(limpid, pure), The waters of, a stream or brook within the country of Moab, which is mentioned in the denunciations of that nation by Isaiah.
Isa 15:6
and Jeremiah.
Jer 48:34
We should perhaps look for the site of Nimrim in Moab proper, i.e. on the southeastern shoulder of the Dead Sea.