פירוש על במדבר 18:19

כל תרומת הקדשים ALL THE HEAVE OFFERINGS OF THE HOLY THINGS [… HAVE I GIVEN THEE] — Out of a feeling of affection for the contents of this section, Scripture comprehends it at first in a general statement (v. 11: וזה לכם תרומת וגו׳), and comprehends it also in a general statement at the end (in this verse) and enumerates the details in between (vv. 12—18) (Sifrei Bamidbar 118).

כל תרומת הקדשים, such as that which is given to the priests of the thanksgiving breads, as well as the two loaves of newly harvested wheat presented on the Shavuot festival.כל תרומת הקדשים, such as that which is given to the priests of the thanksgiving breads, as well as the two loaves of newly harvested wheat presented on the Shavuot festival.

ברית מלח, I believe that the Torah uses the term “salt” to symbolise something which endures indefinitely. It occurs in this sense in Chronicles II 13,5 promising David and his descendants an enduring dynasty by mentioning the covenant of salt as the symbol of this. However, in Leviticus 2,13 the words לא תשבית מלח ברית ה' אלוקיך, the reference to salt is meant literally. ברית מלח, a covenant meant to endure permanently, throughout the ages.