Nedarim 8:5-6

Nedarim 8:5

If one vows “until it rains” or “until the rains will be,” then he is prohibited until the second rainy season; Rabban Shimon ben Gamliel says until the time of the second rainy season (even if the expected rain does not appear). If he vows “until the rains end,” Rabbi Meir says that he is prohibited until the month of Nisan is over and Rabbi Yehuda says he is prohibited until Passover is over. If one says “Konam that I do not taste wine this year,” if a leap year (meaning an extra month of Adar) was declared, he is prohibited the whole year including the extra Adar. If he vowed “…until the beginning of Adar” or “until the end of Adar,” his vow applies to the start or end of the first Adar. Rabbi Yehuda says that if one vows “Konam that I do not taste wine until it will be Passover,” he is only prohibited through the day before Passover (i.e., it’s over for Seder night) because the one who vowed only meant to ban wine upon himself until the time when people drink it, i.e., the four cups.

Nedarim 8:6

If a person vowed saying, “Konam that I do not taste meat until it will be Yom Kippur,” he is only prohibited through the day before Yom Kippur (i.e., until the meal that precedes the fast) because he only meant to ban meat upon himself until the time when people normally eat it. Rabbi Yosi, son of Rabbi Yehuda, says that if one vowed “Konam that I do not taste garlic until it will be Shabbos,” he is prohibited until Friday night because he only meant to ban garlic upon himself until the time when people normally eat it.