Study Eruvin folio 52B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
The Talmud comments: In accordance with whose opinion did Rav Natan bar Oshaya act? Apparently, it was in accordance with the opinion of Rav Yosef that everyone agrees that he must set out on his way, and in accordance with the opinion of R' Yosei bar Yehuda that he need not declare that he is estab
The Talmud rejects this suggestion: No, that is not necessarily so, as it is possible to say that he acted according to the opinion of Rabba, and in accordance with the opinion of R' Yehuda, and Rav Yehuda bar Ishtata declared that he establishes his residence at the end of his Shabbat limit.
We learned in the Mishnah that R' Meir says: Anyone who can establish an eiruv, and negated his residence in his original place, and did not establish an eiruv, is likened to both a donkey driver and a camel driver. The Talmud asks: Didn’t we have already learned it once before in another Mishnah:
Rav Sheshet said: It is necessary to state this ruling here as well, so that you will not say the reason for R' Meir’s statement only applies in a case where there is uncertainty whether one established an eiruv or did not establish an eiruv, and in that case he is in likened to both a donkey driv
Rather, say that even in a case where there is certainty that he did not establish an eiruv he is sometimes likened to both a donkey driver and a camel driver, as here he certainly did not establish an eiruv, and yet he is likened to both a donkey driver and a camel driver. It was therefore necess