The 328th prohibition is that we are forbidden to perform melachah on Shemini Atzeres [the eighth1 day of Sukkos].
The source of this commandment is G‑d's statement, "No servile melachah may be done [on that day]."
You must know that anyone that does any melachah on any of these six days is punished by lashes, unless it is a type of melachah used in preparing food, as the verse2 says regarding one Yom-Tov [Pesach], "The only [melachah] that you may do is that which is needed so that everyone will be able to eat." The same law applies to the other Yomim Tovim.
The details of this commandment are explained in Tractate Beitzah.
