I heard that there is a letter from the Rebbe Rashab (Chabad) that one shouldn't eat chametz on Achron Shel Pesach when they are in Eretz Yisrael (even if they are keeping only one-day Yom Tov.) I ...
Can someone cite lines from the Torah that specify what Jews should eat during Passover? I'm aware that Jews don't eat leavened bread during Passover. Where does this rule come from?
What is the source of the custom to keep the Lulav untill Erev Pesach and burn it with the Chometz?