Reference for Bava Batra 254:3

מספקא ליה אי כרבי יהודה אי כרבנן

he should have sent [word] to them according to R. Judah! — He was in doubt as to whether [the law is] according to R. Judah or according to the Rabbis.<span class="x" onmousemove="('comment',' Hence his original message. ');">²</span>

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