Nedarim 4:4-5

Nedarim 4:4

If one is prohibited by a vow from benefitting from his friend and the friend comes to visit him (when the one who made the vow falls ill), the friend stands and may not sit. The friend is allowed to treat the patient personally but he is not permitted to heal his property (i.e., a sick animal belonging to the one who vowed). They may bathe together in a large pool but not in a smaller tub, and they may sleep together in the same bed. Rabbi Yehuda says they may share a bed in the summer but not in the winter since the one who vowed benefits from the friend’s body heat. They may recline together on a couch and eat at the same table but not from the same plate; they may eat together from a plate that is passed around. They may not eat together from the common pool of food provided to workers and they may not work the same furrow in a field; this is the opinion of Rabbi Meir. The Sages say that they may work together as long as a certain distance is maintained between them.

Nedarim 4:5

If one is prohibited by a vow from benefitting from his friend before shemittah (the sabbatical year), the one who is prohibited cannot enter the field of the one who vowed, nor may he eat his produce that overhangs into another domain. During the shemittah year, he may not enter the field but he may eat his produce that overhangs into another domain. If one is prohibited by a vow from eating from his friend before shemittah, the one who is prohibited may enter the field of the one who vowed but he may not eat from his produce. During the shemittah year, he may enter the field and eat his produce.