Reference for Kiddushin 49:3

בעו מיניה עבד שסרסו רבו בבצים מהו כמום שבגלוי דמי או לא לא הוה בידיה אמרו לו מה שמך אמר להו המנונא אמרו ליה לאו המנונא אלא קרנונא

not attend the session? ' 'Why should we attend? ' replied they, 'when we ask him questions which he cannot answer? ' 'Have you ever asked me anything,' he retorted: 'which I could not solve? ' [Thereupon] they asked him: What if a slave's stones are castrated by his master, is it an open blemish or not? As he was unable to answer it,<span class="x" onmousemove="('comment',' Lit., 'he did not have it in his hand'.');">⁶</span> they said to him, 'What is your name? ' 'Hamnuna,' he replied.'

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