Be ye 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
therefore and let not your hands
yad  (yawd)
a hand (the open one (indicating power, means, direction, etc.),
be weak
raphah  (raw-faw')
to slacken (in many applications, literal or figurative)
for your work
p`ullah  (peh-ool-law')
(abstractly) work -- labour, reward, wages, work.
shall be
yesh  (yaysh)
entity; used adverbially or as a copula for the substantive verb; there is or are
sakar  (saw-kawr')
payment of contract; concretely, salary, fare, maintenance; by implication, compensation, benefit -- hire, price, reward(-ed), wages, worth.