Halakhah su Salmi 16:5

And this commandment is practiced in the Land of Israel at the time when Israel is there - whether by Levites or by Israelites - by males and females, as all are obligated never to change the three places spoken about: the city; the open space; and the fields and vineyards. And it would seem that anyone who did change them with witnesses and a warning would be liable for lashes. But I did not know the measure of this change - how much it would be for him to be liable for it. Be wise, my son, and know it. And Rambam, may his memory be blessed, wrote concerning this commandment (Mishneh Torah, Laws of Sabbatical Year and the Jubilee 13:12), "Why did the Levites not merit [a portion] in the possession of the Land of Israel and in the spoils of war, with his brethren? Because they were set aside to serve God, may He be blessed, and minister unto Him and to instruct His just paths. And therefore they were set apart from the ways of the world: They do not wage war like the remainder of the Israelites, nor do they [receive an inheritance], nor do they acquire [things] for themselves through the power of their bodies. Instead, they are God's legion - as it is stated (Deuteronomy 13:11), 'May the Lord bless His legion' - and He provides for them, as it is stated (Numbers 18:20), 'I am your portion and your possession.' And it is not only the tribe of Levi that is included in this, but each and every man that comes to the world whose spirit has moved him to be separated and to stand in front of God and to serve Him, to know His straight and righteous paths and to teach them to others - the yoke of the many calculations that people seek out is lifted from upon his neck. And behold, he is sanctified to become holy of holies, and God will be his possession for ever and ever. And he will acquire the thing that he needs in this world, just as the tribe of Levi acquired [it]. And so David states (Psalms 16:5), 'The Lord is my appointed portion and my cup, You sustain my fate.'"