How can halachic restrictions that are not in the Torah be reconciled with the Deuteronomy 4:2 passage, which says, "Ye shall not add unto the word which I command you, neither shall ye diminish from ...
It says in Devarim 4;2: לֹא תֹסִפוּ עַל הַדָּבָר אֲשֶׁר אָנֹכִי מְצַוֶּה אֶתְכֶם וְלֹא תִגְרְעוּ מִמֶּנּוּ לִשְׁמֹר אֶת מִצְוֹת יְ־הֹוָ־ה אֱלֹהֵיכֶם אֲשֶׁר אָנֹכִי מְצַוֶּה אֶתְכֶם ...
Is there anything problematic about eating in a sukkah after building it but before Sukkot starts? Or I guess likewise after Sukkot is over?
It seems that there exists a Minhag (a practice of the last Lubavitcher Rebbe Zatzal) of adding extra Hadassim or Aravos (Hashanos) — I am uncertain which, maybe both — to the standard 4 ...