What are the connotations of "Lo Yom Echad, Lo Yomayim ? ad Chodesh Yamim ... "?
Ramban #1: It means 'Not just 1 one day, not just two days ... but thirty!'
Ramban #2: It means 'You won't eat it for one day, or for two days ... but for thirty days'. 2
Ramban #3: It means 'You will not just eat for one, two or five or twn or twenty days (part of a month, but) for a whole month'.
Ramban: The word 'just' applies to each number - like we find in Melachim 2, 7:10.
Ramban: Because if someone eats for thirty consecutive days, it is not called that he ate one, two ... or twenty days.
Why does the Torah mention these numbers?
Da'as Zekenim: In all, they add up to sixty-seven 1 , equal to the number of days in a [leap] year when Yisrael must cease Melachah ? fifty-four Shabbosos, and thirteen days of Yom Tov 2 (four each on Pesach and Sukos, two each on Shavu'os and Rosh Hashanah, and Yom Kipur). These days you will eat without mishap.
R. Chaim Paltiel: "Yom Echad? Esrim Yom" hint to twenty-one days on which one may not eat meat. When do they begin? On the total of "two days? five days? ten days" - the 17th [of Tamuz, until Tish'ah be'Av].
Oznayim la'Torah: The Torah lists seven times, corresponding to the seven levels of sin listed in Bechukosai, 26:14-15, as Rashi explains there.
He counts twenty-nine for "Ad Chodesh" - until then, the merit of Shabbosos and Yamim Tovim will protect you; on day thirty, you will die. (He also brings another Peirush that I did not understand. ? PF)
In Chutz la'Aretz, there are four days of Yom Tov each on Pesach and Sukos, two each on Shavu'os and Rosh Hashanah, and Yom Kipur. Alternatively, mi'd'Oraisa, every year has at least thirteen days of Yom Tov (including Chol ha'Mo'ed) that do not fall on Shabbos. If Rosh Hashanah and Shavu'os fall on Shabbos (in a leap year, they are usually the same day of the week), the thirteen other days are Yom Kipur, six days of Sukos, and six of Pesach. (PF)
