Nedarim

MISHNAH. HE WHO VOWS [ABSTINENCE] FROM DATES IS PERMITTED DATE HONEY; FROM WINTER GRAPES,'  HE IS PERMITTED VINEGAR MADE FROM WINTER GRAPES — R. JUDAH B. BATHYRA SAID: IF IT BEARS THE NAME OF ITS ORIGIN,  AND HE VOWS [TO ABSTAIN] FROM IT,  HE IS FORBIDDEN [TO BENEFIT] FROM WHAT COMES FROM IT. BUT THE SAGES PERMIT IT. GEMARA. But the Sages are identical with the first Tanna? — They differ in respect of the following which was taught: R. Simeon b. Eleazar laid down this general rule: Whatever is eaten itself, and what comes from it too is eaten, e.g., dates and the honey of dates, and he vowed [abstinence] from the substance itself, he is forbidden that which comes from it;  but if he vows [abstinence] from what comes from it, he is also forbidden the substance itself.  But if the substance is not eaten itself, whilst what comes from it is,  and he vowed [abstinence] from the substance itself, he is forbidden only what comes from it,  because he meant nought else but what comes from it. MISHNAH. HE WHO VOWS [ABSTINENCE] FROM WINE MAY PARTAKE OF APPLE-WINE [CIDER]; FROM OIL HE IS PERMITTED SESAME OIL;  FROM HONEY, HE IS PERMITTED DATE HONEY; FROM VINEGAR, HE IS PERMITTED THE VINEGAR OF WINTER GRAPES; FROM LEEKS, HE IS PERMITTED PORRET;  FROM VEGETABLES, HE IS PERMITTED FIELD HERBS,  BECAUSE IT IS A QUALIFYING EPITHET. GEMARA. It was taught: He who vows [to abstain] from oil: to Palestine sesame oil is permitted him, but he is forbidden olive oil; in Babylon, he is forbidden sesame oil but permitted olive oil. In the place where they are both commonly used, both are forbidden. But that is obvious? — It is necessary to teach it only when most people use one: I might think that the majority must be followed. We are therefore taught that a doubtful prohibition is [resolved] stringently. He who vows [abstinence] from vegetables, in normal years is forbidden garden vegetables but permitted wild vegetables; in the seventh year. He is forbidden wild vegetables but permitted garden vegetables.  R. Abbahu said on the authority of R. Hanina b. Gamaliel: