Reference for Bava Batra 194:2

ואלא למעוטי מפיה ומשוליה והא תני רבי חייא מפיה ומשוליה לא יביא ואם הביא כשר

Or, again, [if it is suggested that the object of Rab's statement is] to exclude<span class="x" onmousemove="('comment',' From eligibility for Kiddush. ');">³</span> [the wine] at the mouth<span class="x" onmousemove="('comment',' On account of the mould that usually gathers near the top. ');">⁴</span>

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