Pesahim 105a and Pesahim 105b, stopping eating when Shabbat starts or ends, for kiddush or havdala, and rules for a kos shel beracha, a cup used as part of a beracha ceremony, such as havdalla or birkat hamazon.
Pesahim 105a and Pesahim 105b, stopping eating when Shabbat starts or ends, for kiddush or havdala, and rules for a kos shel beracha, a cup used as part of a beracha ceremony, such as havdalla or birkat hamazon.