(Asked because it seems to have been neglected from the answers to this question.) Is one required to wash Mayim Acharonim from of a cup (or vessel that is kosher for Mayim Rishonim)? Must one use ...
Someone told me that one is not allowed to drink plain water during the third meal of Shabbos (Seudah Shelishit). (or at least that there is a minhag not to). Is this true? And if so, what is the ...