הלכה אויף ויקרא 2:13

It is a mitzvah to have salt on the table before breaking the bread and to dip the piece of bread over which Hamotzi was said, into the salt. The reason for this is that the table is compared to the Altar [in the Holy Temple] and the food symbolizes the offering, and it is said (Leviticus 2:13): "On all your offerings you shall offer salt." And because the table is compared to the Altar, it is best to take care not to kill any vermin [or other insects] on it.

That every sacrifice be salted, as it is said, “With all thine offerings thou shalt offer salt” (Lev. 2:13).

Not to inflict a blemish on cattle set apart for sacrifice, as it is said, “There shall be no blemish therein” (Lev. 22:21). This means, “Thou shalt not cause a blemish in it.”