Hope everyone had a good Rosh haShana and an easy fast yesterday. This week is like the mad sprint at the end of a race where you just have to get moving no matter how tired you are – and depending on your slichos schedule, you probably are as tired as I am : )
It’s fortuitous that daf yomi is learning Kesubos because it is an opportunity to see an important Rashi relevant to hilchos Erev Yom Kippur. The gemara suggests the reason for not scheduling a wedding Motzei Shabbos is “gezeirah shema yishcot ben of” (daf 5a), to avoid the danger of people starting to shect chickens on Shabbos to prepare the feast (aside: the celebration of simchas chassan v’kallah apparently does not demand a meal of meat, as some claim with respect to simchas yom tov where the din of simcha has some relationship to korbanos). By that same logic, asks the gemara, we should not celebrate Yom Kippur immediately following Shabbos because of the danger of beginning to prepare food early for the erev Yom Kippur meal, “l’tzorech seudas machar”, as Rashi explains. Rashi’s emphasis on the seudah of the next day suggests that there is no mitzvah to eat a seudah on the night of Erev Yom Kippur.
The gemara (R”H 9) darshens that just as there is a mitzvah to fast on Yom Kippur, there is a mitzvah to eat Erev Yom Kippur. Shouldn’t this mitzvah apply starting from the previous nightfall, just like the mitzvah of fasting? Apparently the relationship is not exactly parallel, and according to Rashi the mitzvah of eating on Erev Yom Kippur is simply to properly prepare for the fast by having a seudah immediately beforehand.