Talmud for Chullin 2:7
הַשּׁוֹחֵט לְנָכְרִי, שְׁחִיטָתוֹ כְשֵׁרָה. וְרַבִּי אֱלִיעֶזֶר פּוֹסֵל. אָמַר רַבִּי אֱלִיעֶזֶר, אֲפִלּוּ שְׁחָטָהּ שֶׁיֹּאכַל הַנָּכְרִי מֵחֲצַר כָּבֵד שֶׁלָּהּ, פְּסוּלָה, שֶׁסְּתָם מַחֲשֶׁבֶת נָכְרִי לַעֲבוֹדָה זָרָה. אָמַר רַבִּי יוֹסֵי, קַל וָחֹמֶר הַדְּבָרִים, וּמַה בִּמְקוֹם שֶׁהַמַּחֲשָׁבָה פוֹסֶלֶת, בְּמֻקְדָּשִׁין, אֵין הַכֹּל הוֹלֵךְ אֶלָּא אַחַר הָעוֹבֵד, מְקוֹם שֶׁאֵין מַחֲשָׁבָה פוֹסֶלֶת, בְּחֻלִּין, אֵינוֹ דִין שֶׁלֹּא יְהֵא הַכֹּל הוֹלֵךְ אֶלָּא אַחַר הַשּׁוֹחֵט:
When a person had slaughtered an animal for a heathen, it is Cashér; but R. Eleazar decides it to be Pasool. R. Eleazar teaches, "That if he slaughtered it with the intention that the heathen should only eat the caul of the liver of the animal, it is Pasool, because the tacit intention of the heathen is to use it for idolatrous purposes." R. Joshua argued against this, and demonstrated his opinion by a syllogism from minor to major [קל וחומר], "If where the intention renders Pasool, as in the case of consecrated things, the matter is determined by the intention of the acting priest, does it not follow that in the present instance, which relates to non-consecrated things, and where the intention does not render them Pasool, it should be determined by the intention of him that slaughtered?"
Jerusalem Talmud Avodah Zarah
Jerusalem Talmud Gittin
It is forbidden to eat from a sacrifice after its appointed time (piggul) or outside the appropriate sacred precinct. If the slaughterer intends the sacrifice to be eaten at the wrong time or place, the entire sacrifice becomes invalid. But if the owners had the same idea, their intentions are irrelevant; they could invalidate the sacrifice only by actually using it at the wrong time and at the wrong place. R. Yose argues that profane slaughter cannot have rules more strict than sacrificial slaughter. If the owner’s intentions are irrelevant for sacrificial slaughter, they must be irrelevant also for profane slaughter.: “Rebbi Yose said, that is a matter of a conclusion de minore ad majus. Since in a case where thought makes sanctified food unusable, etc.,” and thought invalidates for piggul and leftover132A sacrifice not eaten during its appointed time becomes forbidden as leftover even if it was not intended from the start to be eaten out of its time.. He said to him, truly thought invalidates for piggul and leftover; but if somebody slaughtered with the intention of sprinkling [the victim’s] blood in idolatry or to burn its fat for idolatry, the intention does not invalidate133He holds that only for Jewish sacrifices does the wrong thought at slaughter invalidate the act; for all others the wrong thought invalidates the act but is not transferable to others. If the slaughter was for idolatry, the entire meat is forbidden. If the slaughter was for using part of the blood or fat for idolatry, that blood or fat becomes forbidden by being used; it has no influence on the other parts. (Babli Ḥulin 39a/b).. If he slaughtered and then the blood was sprinkled in an idolatrous rite and the fat was burned in an idolatrous rite134In the Babli (Ḥulin 39b): It was slaughtered and after that [the slaughterer] expressed an intention [of idolatry]., there was such a case in Caesarea and they pronounced neither prohibition nor permission. Rebbi Ḥanina in the name of Rav Ḥisda: This means that they were not apprehensive135In the Babli, the reference is to the opinion of Rabban Simeon ben Gamliel in the Mishnah, who holds that a later action indicates a prior thought. If suicide can validate a prior bill of divorce then idolatrous practice can invalidate a prior slaughter. Since this also explains the insertion of the paragraph here, it has to be accepted as explanation.. If you say that they were apprehensive, they should have taught a prohibition. Rebbi Yose in the name of Rav Ḥisda: This means that they were apprehensive. If you say that they were not apprehensive, they should not have dealt with the case136A rabbi could have dismissed the case without bringing it to the attention of the full court. But what they really said was that the scrupulous should not eat from the meat; those who did eat did not sin..