Tosefta for Chullin 194:23
א"ל
one should measure them as though they were onions or leeks.<span class="x" onmousemove="('comment',' If by substituting onions or leeks for the amount of the forbidden substance the taste of the onions or leeks could be felt in the rest of the stew of the pot, the contents of the pot would be prohibited on account of the forbidden substance, which evidently imparts its flavour so that it can be felt. This method was resorted to before the standard of sixty-fold was fixed.');"><sup>13</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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