נוּם (nûm) is
a Hebrew verb
meaning be drowsy. It appears
6 times
in 3 books of the Hebrew Bible
(Strong's H5123).
Also rendered
to slumber
Same Hebrew root (TWOT 1325)
Root family 1325: נוּםnûm — sleep, slumber, be drowsy. (ASV and RSV similar, except for Nah 3:18 where the RSV translates “your shepherds are asleep” instead of “thy shepherds slumber.”)