The 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).
is prepared
kuwn (koon)
to be erect (i.e. stand perpendicular); hence (causatively) to set up, in a great variety of applications
against the day
yowm (yome)
a day (as the warm hours),
of battle
milchamah (mil-khaw-maw')
a battle (i.e. the engagement); generally, war (i.e. warfare) -- battle, fight(-ing), war(-rior).
but safety
tshuw`ah (tesh-oo-aw')
rescue (literal or figurative, pers., national or spir.) -- deliverance, help, safety, salvation, victory.
is of the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.