Their heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
is as fat
taphash (taw-fash')
apparently to be thick; figuratively, to be stupid -- be fat.
as grease
cheleb (kheh'-leb)
from an unused root meaning to be fat; fat, whether literally or figuratively; hence, the richest or choice part -- best, fat(-ness), finest, grease, marrow.
but I delight
sha`a` (shaw-ah')
(in a good acceptation) to look upon (with complacency), i.e. fondle, please or amuse (self); (in a bad one) to look about (in dismay), dandle, delight (self), play, shut.
in thy law
towrah (to-raw')
a precept or statute, especially the Decalogue or Pentateuch -- law.
