נדרים ד׳Nedarim 4

Mishnah 3ג׳

וְתוֹרֵם אֶת תְּרוּמָתוֹ וּמַעַשְׂרוֹתָיו לְדַעְתּוֹ. וּמַקְרִיב עָלָיו קִנֵּי זָבִין, קִנֵּי זָבוֹת, קִנֵּי יוֹלְדוֹת, חַטָּאוֹת וַאֲשָׁמוֹת, וּמְלַמְּדוֹ מִדְרָשׁ, הֲלָכוֹת וְאַגָּדוֹת, אֲבָל לֹא יְלַמְּדֶנּוּ מִקְרָא. אֲבָל מְלַמֵּד הוּא אֶת בָּנָיו וְאֶת בְּנוֹתָיו מִקְרָא, וְזָן אֶת אִשְׁתּוֹ וְאֶת בָּנָיו אַף עַל פִּי שֶׁהוּא חַיָּב בִּמְזוֹנוֹתֵיהֶם. וְלֹא יָזוּן אֶת בְּהֶמְתּוֹ, בֵּין טְמֵאָה בֵּין טְהוֹרָה. רַבִּי אֱלִיעֶזֶר אוֹמֵר, זָן אֶת הַטְּמֵאָה, וְאֵינוֹ זָן אֶת הַטְּהוֹרָה. אָמְרוּ לוֹ, מַה בֵּין טְמֵאָה לִטְהוֹרָה. אָמַר לָהֶן, שֶׁהַטְּהוֹרָה נַפְשָׁהּ לַשָּׁמַיִם וְגוּפָהּ שֶׁלּוֹ, וּטְמֵאָה נַפְשָׁהּ וְגוּפָהּ לַשָּׁמָיִם. אָמְרוּ לוֹ, אַף הַטְּמֵאָה נַפְשָׁהּ לַשָּׁמַיִם וְגוּפָהּ שֶׁלּוֹ, שֶׁאִם יִרְצֶה, הֲרֵי הוּא מוֹכְרָהּ לְגוֹיִם אוֹ מַאֲכִילָהּ לִכְלָבִים:

And [the one who vowed not to benefit from his friend] may separate his Teruma and his tithes with his [friend's] permission, and may offer his bird offerings [due to being] zav or zava [states of impurity for men and women after night emissions] or [having given] birth, his sin-offering, and his guilt-offering; one may also teach [the friend] Midrash, laws and lore, but may not teach him Scripture - one may, however, teach his sons and his daughters Scripture, and may feed his wife and his sons, even though he [himself] is responsible for their food. But he may not feed his animal, whether it be kosher or non-kosher. Rabbi Eliezer says: "He may feed his non-kosher [animal] but he may not feed his kosher [animal]". [The Sages] said to him: "What is the difference between kosher and non-kosher [animals, regarding this law]?" He responded to them: "Because a kosher [animal], its soul belongs to heaven and its body is his [the owner's], whereas a non-kosher [animal], [both] its soul and body belong to heaven." They responded [back] to him: "Even [in the case of a] non-kosher [animal], its soul belongs to heaven and its body is his, for if he wanted to, surely he could sell [the body] to non-Jews or feed it to his dogs."

Mishnah 4ד׳

הַמֻּדָּר הֲנָאָה מֵחֲבֵרוֹ וְנִכְנַס לְבַקְּרוֹ, עוֹמֵד, אֲבָל לֹא יוֹשֵׁב. וּמְרַפְּאֵהוּ רְפוּאַת נֶפֶשׁ, אֲבָל לֹא רְפוּאַת מָמוֹן. וְרוֹחֵץ עִמּוֹ בְאַמְבַּטִיָא גְדוֹלָה, אֲבָל לֹא בִקְטַנָּה. וְיָשֵׁן עִמּוֹ בְמִטָּה. רַבִּי יְהוּדָה אוֹמֵר, בִּימוֹת הַחַמָּה, אֲבָל לֹא בִימוֹת הַגְּשָׁמִים, מִפְּנֵי שֶׁהוּא מְהַנֵּהוּ. וּמֵסֵב עִמּוֹ עַל הַמִּטָּה, וְאוֹכֵל עִמּוֹ עַל הַשֻּׁלְחָן, אֲבָל לֹא מִן הַתַּמְחוּי, אֲבָל אוֹכֵל הוּא עִמּוֹ מִן הַתַּמְחוּי הַחוֹזֵר. לֹא יֹאכַל עִמּוֹ מִן הָאֵבוּס שֶׁלִּפְנֵי הַפּוֹעֲלִים, וְלֹא יַעֲשֶׂה עִמּוֹ בְאֻמָּן, דִּבְרֵי רַבִּי מֵאִיר. וַחֲכָמִים אוֹמְרִים, עוֹשֶׂה הוּא בְרִחוּק מִמֶּנּוּ:

One who vows [not to] benefit from his friend and comes to visit him [when he is sick], [should] stand, but not sit. And one may heal his [friend’s] body, but not his assets [livestock]. And one may bathe with him in a large bathhouse, but not in a small one. And he may sleep with him in a bed. Rabbi Yehuda says: "[one may sleep in the same bed as the friend] during the summer, but not during the winter, because [during the winter] he will benefit from him." They may sit together on [the same] bed, and one may eat with him at the [same] table, but not from the main dish. However, one may eat [together] from a plentiful main dish. One may not eat with him from a trough which is [put] before workers, and may not work together in the same row [in a field] - these are the words of Rabbi Meir. But the Sages claim that one may work [together as in the same row, so long as each one works] far away [from the other].