Reference for Yevamot 27:10

והאי מאי תיובתא מקומות מקומות שאני ודקארי לה מאי קארי לה

does not supersede the Sabbath!<span class="x" onmousemove="('comment',' Now, in view of the undesirability of creating different sects, why were all these varied practices allowed? ');">¹⁶</span> — What an objection is this! The case, surely, is different [when the varied practices are respectively confined to] different localities. What then did he who raised this question imagine?<span class="x" onmousemove="('comment',' It should have been obvious to him that different localities may differ in their custom. (Cf. supra p. 53, n. 11.) ');">¹⁷</span>

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