Shalom Rav,
I am getting mixed answers (Shulcan aruch, Rabanim)for this seemingly simple question. I make an eiruv tchumin(mazon 2 seudot) 2k from my house. On shabat I walk from my house to the eiruv and then continue another 2k ama. If my 2k ama from the eiruv end in the middle of yerushalayim (walled ciy or eiruv chatzerot)(rechov Yafo) do I have to stop there and have no more to go or is all yerushalayim considered 4 amot ? What if the 2k ama ended in a house. is it the same din as above.
Toda Raba
Avi Stolper, Givat Zeev, Israel
The Halachah is that one only may walk four Amos after his Techum ends even if his Techum ends in middle of a walled city. This is clear from the Mishnah in Eruvin 61a (as well as Eruvin 42b and Tosfos DH Kalsah, and elseewhere.)
The cause of your confusion might be the ruling of Raban Gamliel (Mishnah, 41b) that if a person is taken out of his Techum by Nochrim and placed in an enclosure he is permitted to walk the entire length of the enclosure. If one may walks the entire length of the enclosure when he is outside of his Techum, and when he was not Shoves inside of the Mechitzos, it should follow that he certainly may do so if he is still within his Techum!
Rashi and Tosfos address this point (42a Rashi DH Mehalech, Tosfos DH v'Nochrim). They explain that the Rabanan were more lenient with a person who is no longer inside of his Techum, since, had they not been lenient, he can only walk four Amos. That is why they allowed him to walk the entire length of the enclosure. However, if the person is still in his original Techum (and can walk 2000 Amos on either side of the place where he was Shoves), he may walk no farther than the end of his Techum.
(Tosfos cites a Yerushalmi that seems to contradict Rashi's reasoning; see Ge'on Yakov who discusses how the Yerushlami will explain the Mishnah on Daf 61a.)
I hope this makes things clearer,
Mordecai Kornfeld
Kollel Iyun Hadaf