Strong’s Hebrew
H4944 — mashshaq
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
מַשָּׁק
mashshaq — pronounced mash-shawk
from 8264; a traversing, i.e. rapid motion:--running to and fro. see H08264
1 occurrence in the KJV.
Isaiah 33:4
And your spoil shall be gathered like the gathering of the caterpiller: as the running to and fro of locusts shall he run upon them.