Talmud Bavli, Shabbat
Shabbat 53b
The Talmud discusses the principle of muktzeh and how it applies to various objects on Shabbat, including items set aside for medicinal use. The rabbis debate which items are considered muktzeh due to their designation as remedies and whether handling them is prohibited.
תָּא שְׁמַע: בְּהֵמָה שֶׁאֲחָזָהּ דָּם, אֵין מַעֲמִידִין אוֹתָהּ בְּמַיִם בִּשְׁבִיל שֶׁתִּצְטַנֵּן. אָדָם שֶׁאֲחָזוֹ דָּם, מַעֲמִידִין אוֹתוֹ בְּמַיִם בִּשְׁבִיל שֶׁיִּצְטַנֵּן. אָמַר עוּלָּא: גְּזֵירָה מִשּׁוּם שְׁחִיקַת סַמְמָנִין. אִי הָכִי אָדָם נָמֵי! אָדָם נִרְאֶה כְּמֵיקֵר. אִי הָכִי בְּהֵמָה נָמֵי נִרְאֶה כְּמֵיקֵר! אֵין מֵיקֵר לִבְהֵמָה.
The Gemara cites an additional proof: Come and hear that which was taught in the following baraita: With regard to an animal suffering from heart congestion that restricts its blood supply and whose temperature has risen, one may not stand it in water so that it will cool off. However, with regard to a person suffering from heart congestion that restricts his blood supply, one may stand him in water so that he will cool off. Apparently, the suffering of an animal is of no concern. Ulla said: Here, the Sages issued a decree prohibiting all healing on Shabbat due to the crushing of herbs for medicinal purposes, which is prohibited by Torah law. The Sages prohibited cooling the animal in water lest one come to grind the ingredients used in the preparation of medicine. If so, the same decree should also apply in the case of a person. It should be prohibited to stand a sick person in water to cool him off due to the rabbinic prohibition against engaging in healing on Shabbat. The Gemara answers: In the case of a person, it appears as if he entered the water merely to cool off, not necessarily to cure an illness. The Gemara asks: If so, say in the case of an animal as well that it appears as if it entered the water merely to cool off, not necessarily to cure an illness. The Gemara answers: An animal does not typically enter the water on its own to cool off. Neither does one typically stand an animal in water to cool it off unless it serves some healing purpose. Apparently, due to a decree, the Sages were stringent and prohibited standing the animal in water even if it will die as a result.