Because of the mountain
har (har)
a mountain or range of hills (sometimes used figuratively) -- hill (country), mount(-ain), promotion.
of Zion
Tsiyown (tsee-yone')
Tsijon (as a permanent capital), a mountain of Jerusalem -- Zion.
which is desolate
shamem (shaw-mame')
to stun (or intransitively, grow numb), i.e. devastate or (figuratively) stupefy (both usually in a passive sense)
the foxes
shuw`al (shoo-awl')
a jackal (as a burrower) -- fox.
walk
halak (haw-lak')
to walk (in a great variety of applications, literally and figuratively)
upon it