Talmud for Avodah Zarah 5:9
אֵלּוּ אֲסוּרִין, וְאוֹסְרִין בְּכָל שֶׁהֵן. יֵין נֶסֶךְ, וַעֲבוֹדָה זָרָה, וְעוֹרוֹת לְבוּבִין, וְשׁוֹר הַנִּסְקָל, וְעֶגְלָה עֲרוּפָה, וְצִפֹּרֵי מְצֹרָע, וּשְׂעַר נָזִיר, וּפֶטֶר חֲמוֹר, וּבָשָׂר בְּחָלָב, וְשָׂעִיר הַמִּשְׁתַּלֵּחַ, וְחֻלִּין שֶׁנִּשְׁחֲטוּ בָעֲזָרָה, הֲרֵי אֵלּוּ אֲסוּרִין וְאוֹסְרִין בְּכָל שֶׁהֵן:
These are forbidden and forbid by any amount. [Wherever there is an admixture of even one of them in a thousand (of heter), it forbids the whole]: yayin nesech [One jug in a thousand jugs (of heter) forbids all in the derivation of benefit. This is not the halachah, but as we have written in the end of the third chapter, viz.: he casts the worth of that jug into the Dead Sea and it is permitted to derive benefit from the rest and forbidden to drink it.], and idolatry [a worshiped figure which became intermixed with a thousand non-idolatrous figures, and "heart-hides" [see 2:33], and a stoned ox, and the birds of a leper [viz. Kiddushin 2:8] and the hair of a Nazirite, [from which it is forbidden to derive benefit, viz. (Numbers 6:18): "And he shall take the hair of the head of his Naziritism, and he shall place it on the fire under the sacrifice of the peace-offerings." If a lock of a Nazir's hair became intermixed with even a thousand locks of other hair, they are all forbidden in derivation of benefit.], the first-born of an ass, [from which derivation of benefit is forbidden so long as it has not been redeemed], and meat in milk [If a piece of meat were cooked in milk, and it became intermixed in a thousand permitted pieces, it is forbidden to derive benefit from all of them. This tanna holds that something which is countable and from which derivation of benefit is forbidden forbids its admixture by any amount. And all these things which are mentioned in our Mishnah are things which are countable and whose issur is that of derivation of benefit], and the sent-away scapegoat, and chullin (a non-consecrated animal) slaughtered in the azarah (the Temple court) [see Kiddushin 2:9] — (All of) these are forbidden and they forbid by any amount. [("these") to exclude things which are not countable or which are countable but not forbidden in derivation of benefit, which do not forbid their admixture by any amount.]