Reference for Pesachim 38:6

גופא ר' אלעזר ור' יוסי בר' חנינא חד אמר לא גזרו על ספק הרוקין שבירושלים וחד אמר לא גזרו על ספק הכלים שבירושלים רוקין תנינא כלים תנינא

Surely it was stated, R'Eleazar and R'Jose son of R'Hanina, - one said, They did not decree [uncleanness] for doubtful saliva in Jerusalem;<span class="x" onmousemove="('comment',' If saliva is found and we do not know whose it is, though it might be that of a zab or a zabah, which by Scriptural law is a 'father' of uncleanness and defiles human beings and utensils.');">⁹</span> while the other said: They did not decree [uncleanness] for doubtful utensils in Jerusalem?<span class="x" onmousemove="('comment',' Which includes a needle.');">¹⁰</span>

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