The Gemara (Shabbat 111a) mentions "טיבול", literally "dipping", which Rashi explains is the meal, which featured lots of dipping. In the Pesach classic, it says "on all other nights we do not dip ...
In Nishmas said on Shabbos and Yom Tov mornings we say, “you redeemed us from Egypt and delivered us from the house of bondage; you fed us in famine” (all describing times of trouble) “and sustained ...
To the best of my knowledge eating fish after meat has the same Halacha as eating meat after fish. You are supposed to eat a cracker and take a drink to seperate between them. Why is it most common ...