Only be thou strong
chazaq  (khaw-zak')
to fasten upon; hence, to seize, be strong (figuratively, courageous, causatively strengthen, cure, help, repair, fortify), obstinate; to bind, restrain, conquer
and very
m`od  (meh-ode')
vehemence, i.e. (with or without preposition) vehemently; by implication, wholly, speedily, etc.
'amats  (aw-mats')
to be alert, physically (on foot) or mentally (in courage)
that thou mayest observe
shamar  (shaw-mar')
to hedge about (as with thorns), i.e. guard; generally, to protect, attend to, etc.
to do
`asah  (aw-saw')
to do or make, in the broadest sense and widest application
according to all the law
towrah  (to-raw')
a precept or statute, especially the Decalogue or Pentateuch -- law.
which Moses
Mosheh  (mo-sheh')
drawing out (of the water), i.e. rescued; Mosheh, the Israelite lawgiver -- Moses.
my servant
`ebed  (eh'-bed)
a servant -- bondage, bondman, (bond-)servant, (man-)servant.
tsavah  (tsaw-vaw')
(intensively) to constitute, enjoin -- appoint, (for-)bid, (give a) charge, (give a, give in, send with) command(-er, -ment), send a messenger, put, (set) in order.
thee turn
cuwr  (soor)
to turn off (literal or figurative)
not from it to the right hand
yamiyn  (yaw-meen')
the right hand or side (leg, eye) of a person or other object (as the stronger and more dexterous); locally, the south -- + left-handed, right (hand, side), south.
or to the left
smo'wl  (sem-ole')
dark (as enveloped), i.e. the north; hence (by orientation), the left hand -- left (hand, side).
that thou mayest prosper
sakal  (saw-kal')
to be (causatively, make or act) circumspect and hence, intelligent
whithersoever thou goest
yalak  (yaw-lak')
to walk; causatively, to carry (in various senses)