Numbers 18:19

19 Every special offering of the holy things, whatsoever the children of Israel shall specially offer to the Lord, I have given to thee and to thy sons and to thy daughters with thee, a perpetual ordinance: it is a covenant of salt for ever before the Lord, for thee and thy seed after thee.

Numbers 18:19 Meaning and Commentary

Numbers 18:19

All the heave offerings of the holy things
All before mentioned, and whatsoever comes under that name:

which the children of Israel offer unto the Lord;
either by his commandment, or of their own freewill;

have I given thee, and thy sons, and thy daughters with thee, by a
statute for ever:
so providing for their maintenance by an irrepealable law as long as their priesthood lasted, even until the Messiah should come:

it [is] a covenant of salt for ever before the Lord unto thee, and thy
seed with thee:
an incorruptible, inviolable, durable covenant, which should last for ever, even until the Gospel dispensation or world to come should take place; and it would remain ever before the Lord in his sight, who would take care it should never be made void, but stand fast with Aaron and his posterity as long as his priesthood endured.

Numbers 18:19 In-Context

17 But thou shalt not redeem the first-born of calves and the first-born of sheep and the first-born of goats; they are holy: and thou shalt pour their blood upon the altar, and thou shalt offer the fat as a burnt-offering for a smell of sweet savour to the Lord.
18 And the flesh shall be thine, as also the breast of the wave-offering and as the right shoulder, it shall be thine.
19 Every special offering of the holy things, whatsoever the children of Israel shall specially offer to the Lord, I have given to thee and to thy sons and to thy daughters with thee, a perpetual ordinance: it is a covenant of salt for ever before the Lord, for thee and thy seed after thee.
20 And the Lord said to Aaron, Thou shalt have no inheritance in their land, neither shalt thou have any portion among them; for I thy portion and thine inheritance in the midst of the children of Israel.
21 And, behold, I have given to the sons of Levi every tithe in Israel for an inheritance for their services, whereinsoever they perform ministry in the tabernacle of witness.

Footnotes 1

The Brenton translation of the Septuagint is in the public domain.