Verse Lv02-13a discussing the
requirement of salting (rest) offerings
And every meal-offering of thine shalt thou season with salt; neither shalt thou suffer the salt of the covenant of thy G-d to be lacking from thy meal-offering; with all thy offerings thou shalt offer salt.
Rav Hirsch (in Nu) explains the
symbolism of salt: After reviewing
many biblical verses we see that salt
is used to indicate destruction. But salt is also used to preserve meat from decay.
How can the same item be used for both perservation and destruction?
Using this symbolism we can understand the symbolic requirement of salting offerings: Whatever lessons are taught by the offerings must not be transient one day lessons in the Temple but permanantly preserved eternally. <
Advanced Rashi: But Rashi does not say this. Rather Rashi crytpically says: Water and salt made a deal at creation. Water is used on the Succah festival while salting is done to sacrifices.