Who knoweth
yada` (yaw-dah')
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially
if he will return
shuwb (shoob)
to turn back (hence, away) transitively or intransitively, literally or figuratively
and repent
nacham (naw-kham')
comfort (self), ease (one's self), repent(-er,-ing, self).
and leave
sha'ar (shaw-ar')
to swell up, i.e. be (causatively, make) redundant -- leave, (be) left, let, remain, remnant, reserve, the rest.
a blessing
Brakah (ber-aw-kaw')
benediction; by implication prosperity -- blessing, liberal, pool, present.
behind
'achar (akh-ar')
the hind part; generally used as an adverb or conjunction, after (in various senses)
him even a meat offering
minchah (min-khaw')
a donation; euphemistically, tribute; specifically a sacrificial offering (usually bloodless and voluntary) -- gift, oblation, (meat) offering, present, sacrifice.
and a drink offering
necek (neh'-sek)
a libation; also a cast idol -- cover, drink offering, molten image.
unto the LORD
Yhovah (yeh-ho-vaw')
(the) self-Existent or Eternal; Jehovah, Jewish national name of God -- Jehovah, the Lord.
your God
'elohiym (el-o-heem')
angels, exceeding, God (gods)(-dess, -ly), (very) great, judges, mighty.