Tosefta for Chullin 194:5
ומין במינו דליכא למיקם אטעמא אי נמי מין בשאינו מינו דאיסורא דליכא קפילא בששים
Where substances of like kind were mixed together, in which case it is impossible to discern whether one imparts a flavour to the other; or where substances of different kinds, one of which was forbidden, were mixed together, and no [gentile] cook is available, then the test is sixty [to one].<span class="x" onmousemove="('comment',' I.e., the flavour of the forbidden substance is neutralized and lost if the bulk of the permitted substance is sixty times as large as the bulk of the forbidden substance.');"><sup>3</sup></span>
Tosefta Terumot
Unclean fish that was pickled with clean fish: He washes [the clean fish] thoroughly and it is permitted. Unclean salted fish and clean unsalted fish: It is forbidden. Clean salted fish and unclean unsalted fish: It is permitted. Unclean fish that was cooked with clean fish: We treat it as though [the clean fish was cooked with] leeks (see Hul. 97b:8) -- if there is sufficient quantity to impart taste, it is forbidden, and if not, it is permitted.
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