Then shall we know
yada` (yaw-dah')
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially
if we follow
radaph (raw-daf')
to run after (usually with hostile intent; figuratively (of time) gone by) -- chase, put to flight, follow (after, on), hunt, (be under) persecute(-ion, -or), pursue(-r).
on to know
yada` (yaw-dah')
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially
the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
his going forth
mowtsa' (mo-tsaw')
brought out, bud, that which came out, east, going forth, goings out, that which (thing that) is gone out, outgoing, proceeded out, spring, vein, (water-)course (springs).
is prepared
kuwn (koon)
to be erect (i.e. stand perpendicular); hence (causatively) to set up, in a great variety of applications
as the morning
shachar (shakh'-ar)
dawn (literal, figurative or adverbial) -- day(-spring), early, light, morning, whence riseth.
and he shall come
bow' (bo)
to go or come (in a wide variety of applications)
unto us as the rain
geshem (gheh'-shem)
a shower -- rain, shower.
as the latter
malqowsh (mal-koshe')
the spring rain; figuratively, eloquence -- latter rain.
and former rain
yarah (yaw-raw')
to flow as water (i.e. to rain); transitively, to lay or throw (especially an arrow, i.e. to shoot); figuratively, to point out (as if by aiming the finger), to teach
unto the earth
'erets (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.