Reference for Bekhorot 72:52

תנינא

<big><b>GEMARA: </b></big>Both R'Simlai and R'Judah the Prince reported in the name of R'Joshua B'Levi, (another version is: R'Simlai and R'Joshua B'Levi both reported in the name of R'Judah the Prince) : The permitting of a firstling<span class="x" onmousemove="('comment',' To be slaughtered in consequence of a blemish.');">³²</span>

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