My flesh
sh'er (sheh-ayr')
flesh (as swelling out), as living or for food; generally food of any kind; figuratively, kindred by blood -- body, flesh, food, (near) kin(-sman, -swoman), near (nigh) (of kin).
and my heart
lebab (lay-bawb')
the heart (as the most interior organ)
faileth
kalah (kaw-law')
to end, whether intransitive (to cease, be finished, perish) or transitived (to complete, prepare, consume)
but God
'elohiym (el-o-heem')
angels, exceeding, God (gods)(-dess, -ly), (very) great, judges, mighty.
is the strength
tsuwr (tsoor)
a cliff (or sharp rock, as compressed); generally, a rock or boulder; figuratively, a refuge; also an edge (as precipitous)
of my heart
lebab (lay-bawb')
the heart (as the most interior organ)
and my portion
cheleq (khay'lek)
smoothness (of the tongue); also an allotment -- flattery, inheritance, part, partake, portion.
for ever
`owlam (o-lawm')
concealed, i.e. the vanishing point; generally, time out of mind (past or future), i.e. (practically) eternity; frequentatively, adverbial (especially with prepositional prefix) always