Талмуд к Бамидбар 19:14

Rebbi Simeon ben Eleazar said¹²⁹This name attribution cannot be correct since R. Simeon ben Eleazar was a Tanna, student of R. Meïr. A statement of his appears in Tosephta Ahilut 2:6, denying that people with a trepanned skull can survive a winter. Probably one has to read: R. Eleazar said., it was formulated following Rebbi Simeon, as it was stated: ¹³⁰This refers to the Mishnah and explains why spine and skull were mentioned separately when “half a qab of bones” is also mentioned and both a skull and a spine fill the required volume of about 1 liter. A similar (anonymous) text is in Tosephta Ahilut 2:5: “A spine of which bones were removed is pure even if its outline still exists; But in a grave it is impure, even if broken, even if crushed, since the grave unites them.” The spine and the skull are impure even if crushed, even disconnected, because the grave unites them as “a human in a tent”¹³¹Num. 19:14..

[A house in] Jerusalem cannot contract ritual impurity of leprous marks. Nor can it be judged as a condemned city. Nor can one build ledges, balconies, or water channels in public spaces, because they create an enclosure for (death and) impurity.¹Which would render ritually impure anyone who shared the space with a corpse. Nor may a corpse be left there overnight. Nor may human bones be carried through the city. Nor may a stranger be given permanent residence there. Nor may graves be placed there, except for the graves of members of the House of David or the prophetess Hulda, which have been there from the days of the first prophets. (And when they removed all the graves from the city, why were these not removed?) They say there was a grotto there that would take all the impurities out into the Kedron River. One may not plant any plants there. Nor may one make a garden or an orchard there, aside from the rose gardens which have been there since the days of the first prophets. Nor may one raise (geese or) chickens there, let alone pigs. Nor may garbage heaps be established there, because of impurity.²Because repugnant creatures are attracted to such heaps, and they impart ritual impurity upon their death. A stubborn and rebellious son cannot be judged there, said Rabbi Natan, for it says (Deuteronomy 21:19), “His father and mother shall grab him and take him to the elders of the city, to the gate of his place”; but this is not his city, nor his place. Houses sold there cannot include the land they are on. [Houses cannot be sold as a permanent possession] in the city after twelve months. Rent may not be collected there, except for [the use of] beds and mattresses. Rabbi Yehudah said: even rent for beds and mattresses [was not collected].
What would they do with the skins of the sacrificed animals? They would give them to the owners of guest houses. Rabbi Shimon ben Gamliel said: innkeepers were inside the city, and the owners of guest houses were outside. The innkeepers would buy sheepskins with fine wool for four or five sela and then sell them to the people of Jerusalem, and that is how these homeowners got rich.