Halakhah sobre Números 18:1

From the roots of the commandment, [there is a need to] preface that there is no doubt that God separated the entire tribe of Levi from the congregation of Israel to always serve Him. And still, within that tribe itself, one [group] was selected to be the head, the officer and the minister over all of them - he and his seed forever, and it is the most sacred of all the tribe - to serve and to minister before God permanently. And He placed the rest of the whole tribe below it, to assist in the service - and as it states (Numbers 18:1), "And the Lord spoke to Aharon saying, 'You, your sons, and your patriarchal lineage shall bear the iniquity of the Temple - meaning to say, that the entire tribe will receive the guarding of the Temple. "But you and your sons with you will bear the iniquity of your priesthood" - meaning to say that the primary service - that is the priesthood - is upon you. And it is written after it (Numbers 18:2), "Also your brothers, the tribe of Levi, the tribe of your father, bring close with you, and they shall accompany you and serve you" - meaning to say that you are primary, and not them. And so [too,] is it written elsewhere (Numbers 3:9), "And you shall give the Levites to Aharon and to his sons; they are truly given to him." And so, since the priests are 'the foundation of the home' in the service of our God, they merited twenty-four gifts that are given to them, which are explicit in Scripture, and as the Sages, may their memory be blessed, enumerated (Chullin 133b) - ten in the Temple, four in Jerusalem and ten [outside]. And the rest of the tribe that was chosen with it to assist it also merited to live [from gifts], without toil, with the tithe of the fruits that they take from all Israel. And in order that they know and contemplate that the cause of their portion being free and of the portion of their brothers is the service to God, they were commanded to give a tenth of all they take from the Children of Israel to the 'greater ministers.' And in this way, they will [remind themselves] that there are [others] above them, and that above all of them is the One Who guards all, may He be elevated. With this is also merit, honor and prestige for the Levites, without removing their names from the commandment of the tithe in their portion of the produce. And [the sons of the Israelites] will not [be able to] say to [the sons of the Levites], "You merited the grain, and we the commandment." And now the response will be, "There is 'Torah and there is flour.'"