The
117th mitzvah is that we are
commanded regarding the financial evaluation (erachin) of fields.
The
sources for this commandment are G‑d's statements, "If [a person consecrates] a field from his
hereditary property..." and "If the field is not his hereditary property but a
field he has bought...."
If
it is hereditary property, "its value shall be calculated according to the
amount of seed [required to sow it]."
If
the field was purchased, "The kohen
shall calculate the proportion of its value [on the basis of the number of
years remaining until the jubilee year]."
The
details of this mitzvah are also
explained in tractate Erachin.
Do
not think that these four categories of evaluation share something in common
which requires them to be counted together as one mitzvah. Each one has its unique regulations, and is therefore
counted separately. All they share in common is the title "evaluation" (erach). Therefore, the various
categories of erachin cannot be
counted as only one mitzvah just as
the various types of sacrifices are not counted as only one mitzvah. After careful consideration,
this will become clear.