Da'as Zekenim: The Gematriya of "Saser" equals that of 'Rechilus' (Chaser, without a 'Vav'). Ba'al ha'Turim ? the Gematriya of "ba'Saser" equals that of "Masar (or Moser, without a 'Vav') Mamon Chaveiro", or (including one for the word itself) that of 'bi'Leshon ha'Ra (Pirkei d'R. Eliezer 53).

Nesivos Olam (Nesiv ha'Lashon 7): Lashon ha'Ra does not apply in front of the victim spoken about. If he is present, it does not depend on speech. The speaker could hit or kill him, and the victim could defend himself. Chafetz Chayim (Klal 2, 2nd Hagahah in Be'er Mayim Chayim) ? This is difficult. The Sifri says that Miriam spoke about Moshe in front of him, and it is called Lashon ha'Ra! Pachad Yitzchak (Shavu'os 3) ? there are two kinds of Lashon ha'Ra: 1. Seeking blemishes in another person; 2. Judging another culpable, and revealing this to others. The primary Aveirah is judging negatively, only a condition to transgress is telling others. All agree that this is even in front of him. Nesivos Olam is discussing only the first kind of Lashon ha'Ra.

The Rashbam must hold like this, since he writes that it says here "ba'Saser" because sometimes it is done in public - and if it was referring to Lashon ha'Ra, we know this only from the word "ba'Saser!" - PF.

Refer to 27:24:151:1.

Gur Aryeh: Based on the fact that Moshe and Eliyahu did not ascend higher than ten [Tefachim], because above that pertains to the higher beings, eleven demonstrates that the K'lalos are from Hashem. 3. "Arur" begins with an 'Alef' (whose Gematriya is one), which alludes to an absence of increase; B'rachah begins with a 'Beis' (two), which signifies the beginning of increase.

Shem mi'Shmuel (5670): Since Moshe blessed the other tribes [in ve'Zos ha'Berachah, before the K'lalos were given], the K'lalos would not cleave to them. Hadar Zekenim - also Ya'akov did not bless Shimon. He did not bless Levi either - due to the episode with Shchem - but Levi did Teshuvah by the Eigel. R. Bachye explains that Moshe did not intend to bless Shimon due to the episode of Ba'al Pe'or.

Targum Yonasan (in Pasuk 26): These twelve covenants were made on Sinai, repeated in the Ohel Mo'ed and repeated again in the Plains of Mo'av ? thirty-six Brisos in all ? See Na'ar Yonasan.

The Yerushalmi in Pe'ah, 1:1 learns it from Adoniyahu (How can we learn it from Adoniyahu, who was considered a Rodef?) If he became king, he would have certainly tried to kill Shlomoh (Ralbag Melachim, 1 1:21)! Alei Tamar (Pe'ah 1:1) explains that every feud is prone to come to murder. Does this apply even to feuds over seats or honor in the Beis ha'Keneses? (PF. Indeed, a feud about who will be Shali'ach Tzibur once led to murder - Magihah to Chesed la'Alafim 53:7, citing Imros Kesef p.131).