Reference for Bava Batra 187:7

אמר רב הונא אם בא לנפות מנפה את כולו אמרי לה דינא ואמרי לה קנסא

lentils, [however,] had to be [specifically mentioned].<span class="x" onmousemove="('comment',' That only a quarter of a kab of sandy matter need be accepted. ');">¹³</span> Because it might have been thought that, since they are usually plucked, [the buyer] must accept even more than a quarter [of a <i>kab</i>], [the quantity], therefore, had to be [specifically] stated.

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