SEV Biblia, Chapter 18:19
Todas las ofrendas elevadas de las cosas santas, que los hijos de Israel ofrecieren al SEŅOR, las he dado para ti, y para tus hijos y para tus hijas contigo, por estatuto perpetuo; pacto de sal perpetuo es delante del SEŅOR para ti y para tu simiente contigo.
Clarke's Bible Commentary - Numbers 18:19
Verse 19. It is a covenant of salt] That is, an incorruptible, everlasting covenant. As salt was added to different kinds of viands, not only to give them a relish, but to preserve them from putrefaction and decay, it became the emblem of incorruptibility and permanence. Hence, a covenant of salt signified an everlasting covenant. We have already seen that, among the Asiatics, eating together was deemed a bond of perpetual friendship; and as salt was a common article in all their repasts, it may be in reference to this circumstance that a perpetual covenant is termed a covenant of salt; because the parties ate together of the sacrifice offered on the occasion, and the whole transaction was considered as a league of endless friendship. See the note on "Lev. ii. 13.
John Gill's Bible Commentary
Ver. 19. All the heave offerings of the holy things , etc.] 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.
Matthew Henry Commentary
Verses 8-19 - All believers are spiritual priests, and God has promised to take car of them. Godliness has the promise of the life that now is. And from the provision here made for the priests, the apostle shows that it is the duty of christian churches to maintain their ministers. Scandalou maintenance makes scandalous ministers. The priests were to be wholl devoted to their ministry, not diverted from it, or disturbed in it, by worldly care or business. Also, that they might be examples of livin by faith, not only in God's providence, but in his ordinances. The bes should be offered for the first-fruits unto the Lord. Those who thin to save, by putting God off with the refuse, deceive themselves, for God is not mocked.
Original Hebrew
כל 3605 תרומת 8641 הקדשׁים 6944 אשׁר 834 ירימו 7311 בני 1121 ישׂראל 3478 ליהוה 3068 נתתי 5414 לך ולבניך 1121 ולבנתיך 1323 אתך 854 לחק 2706 עולם 5769 ברית 1285 מלח 4417 עולם 5769 הוא 1931 לפני 6440 יהוה 3068 לך ולזרעך 2233 אתך׃ 854