Leviticus 2:13

And every oblation of thy meat offering shalt thou season with salt,.... Which makes food savoury, and preserves from putrefaction; denoting the savouriness and acceptableness of Christ as a meat offering to his people, he being savoury food, such as their souls love, as well as to God the Father, who is well pleased with his sacrifice; and also the perpetuity of his sacrifice, which always has the same virtue in it, and of him as a meat offering, who is that meat which endures to everlasting life, John 6:27 and also the grave and gracious conversation of those that by faith feed upon him, Mark 9:50

neither shall thou suffer the salt of the covenant of thy God to be lacking from thy meat offering; this seems to suggest the reason why salt was used in meat offerings, and in all others, because it was a symbol of the perpetuity of the covenant, which from thence is called a covenant of salt, Numbers 18:19 namely, the covenant of the priesthood, to which these sacrifices belonged, Numbers 25:13 hence the Targum of Jonathan,

"because the twenty four gifts of the priests are decreed by the covenant of salt, therefore upon all thine offerings thou shalt offer salt:''

with all thine offerings thou shall offer salt, even those that were not to be eaten, as well as those that were; as the burnt offering of the herd, of the flock, and of fowls, and their several parts; all were obliged to be salted that were offered, excepting wine, blood, wood, and incense x; hence there was a room in the temple where salt was laid up for this purpose, called לשכת מלח, "the salt room" y; and which was provided by the congregation, and not by a private person z; our Lord has reference to this law in Mark 9:49 the Heathens always made use of salt in their sacrifices a.

x Maimon. Issure Mizbeach, c. 5. sect. 11. y Misn. Middot, c. 5. sect. 2. z Maimon. Issure Mizbeach, c. 5. sect. 13. a Ante Deos Homini, c. Ovid. Fastor. l. 1. Vid. Horat. Carmin. l. 3. Ode 23.