That led
yalak  (yaw-lak')
to walk; causatively, to carry (in various senses)
them through the deep
thowm  (teh-home')
an abyss (as a surging mass of water), especially the deep (the main sea or the subterranean water-supply) -- deep (place), depth.
as an horse
cuwc  (soos)
from an unused root meaning to skip (properly, for joy); a horse (as leaping); also a swallow (from its rapid flight) -- crane, horse(-back, -hoof).
in the wilderness
midbar  (mid-bawr')
a pasture (i.e. open field, whither cattle are driven); by implication, a desert; also speech (including its organs) -- desert, south, speech, wilderness.
that they should not stumble
kashal  (kaw-shal')
to totter or waver (through weakness of the legs, especially the ankle); by implication, to falter, stumble, faint or fall