Behold I will put
yatsag  (yaw-tsag')
to place permanently -- establish, leave, make, present, put, set, stay.
a fleece
gazzah  (gaz-zaw')
a fleece -- fleece.
of wool
tsemer  (tseh'-mer)
wool -- wool(-len).
in the floor
goren  (go'-ren)
a threshing-floor (as made even); by analogy, any open area -- (barn, corn, threshing-)floor, (threshing-, void) place.
and if the dew
tal  (tal)
dew (as covering vegetation) -- dew.
be on the fleece
gazzah  (gaz-zaw')
a fleece -- fleece.
only and it be dry
choreb  (kho'-reb)
drought or desolation -- desolation, drought, dry, heat, utterly, waste.
upon all the earth
'erets  (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.
beside then shall I know
yada`  (yaw-dah')
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially
that thou wilt save
yasha`  (yaw-shah')
to be open, wide or free, i.e. (by implication) to be safe; causatively, to free or succor
Yisra'el  (yis-raw-ale')
he will rule as God; Jisrael, a symbolical name of Jacob; also (typically) of his posterity: --Israel.
by mine hand
yad  (yawd)
a hand (the open one (indicating power, means, direction, etc.),
as thou hast said
dabar  (daw-bar')
perhaps properly, to arrange; but used figuratively (of words), to speak; rarely (in a destructive sense) to subdue