What is the significance of the phrase "ve'Anshei Kodesh Tih'yun Li"?
Rashi: It goes together with the rest of the Pasuk - If you will be holy by desisting from eating the abominable Neveilos and T'reifos, then you will belong to Me, but not if you won't!'
Ramban: The Mitzvos concerning forbidden food, as opposed to the Mitzvos that the Torah dealt with until now (which counter wicked behavior), are meant to instill a purity of Soul; 1 hence the Torah commands us to be holy, 2 in order to cleave to Hashem, who is holy.
Seforno: With reference to the previous Pesukim, the Torah is saying that when one designates one's firstborn for Hashem, they will go on to teach the people Torah and they will be holy.
Targum Yonasan: It is an injunction to eat one's Chulin be'Taharah.
Oznayim la'Torah: Don't desist from eating a T'reifah (that has been torn by a Chayah) because it is unhealthy, but because eating it interferes with being holy. 5
As there is nothing intrinsically wicked in eating forbidden food.
Since forbidden foods create a coarseness that renders a person impure, which is the antithesis of holiness. See also Vayikra 11:23-24 (Ramban).
Incorporating the flesh of a live animal (See Targum Yonasan and Peirush Yonasan).
Not in the literal sense, since a T'reifah animal is not Metamei in the way that a Neveilah is. As a matter of fact, the Torah uses the same expression with regard to Neveilah (See Devarim 14:21 [Rashbam]) and with regard to Sheratzim (in Vayikra 11:23-24) though there the Torah adds "Al Teshaktzu es Nafshoseichem" (Ramban).
Why does the Torah insert the word "ba'Sadeh?
Zevachim, 82b: It teaches us that, if Basar Kodshim leaves the Azarah, it becomes Pasul because it left its border - and by the same token, if an animal has trouble giving birth, and the baby sticks out a leg and withdraws it, 3 even though the baby is permitted, the leg is forbidden
From where do we know that an animal that becomes a T'reifah in the house is forbidden?
Rashi: Refer to 22:30:2:1.
Mechilta: We learn it from the comparison of T'reifah to Neveilah (by which the Torah does not differentiate) in Enor, Vayikra, 22:8.
Why does the Torah require a T'reifah to be thrown to a dog? What if one wants to give or sell it to a Nochri?
Rashi (citing the Mechilta): In fact, one is permitted to sell a T'reifah 1 to a Nochri, and the Torah mentions specifically throwing it to a dog, to reward the dogs 2 for not barking in Egypt, 3 when Hashem appeared with His angels (including the Angel of Death) to kill the firstborn. 4
Hadar Zekenim: Dogs guard flocks from wolves that seek to tear them, so they receive Tereifos. Da'as Zekenim - also, they are Moser Nefesh to save themselves from wolves.
Oznayim la'Torah (citing the Ra'avya): The dog deserves to be thrown the T'reifah, since it helps the owner fend off attackers from seizing the sheep. 5
Kal va'Chomer from Neveilah, by which the Torah writes in Devarim (24:21) "O Machor le'Nochri" (See Sifsei Chachamim). In fact, the Torah gives more acknowledgement to the dog which receives the T'reifah free of charge, than to the Nochri, to whom one sells the Neveilah (Rashi in Pesachim, 22a).
'because Hashem does not withhold the reward of any creature' (Rashi citing the Mechilta).
See Sh'mos 11:7.
As the Mechilta comments in Bo on Sh'mos 11:7.
Oznayim la'Torah, citing the Zohar attributes the fact that the K'laf for Sefarim Tefilin and Mezuzos is tanned in dog-faeces to their not barking in Egypt. See also Oznayim la'YTorah, who also explains why the digs bark when Eliyahu comes to town.
What does the word "la'Kelev Tashlichun Oso" come to prelude?
Pesachim, 22a (citing R. Yehudah): It comes to preclude all other Isurin 1
Pesachim 22a learns from here that one may not benefit from Chulin slaughtered b'Azarah. How did Chachamim infer this?
Kol Eliyahu: The verse teaches also that you cast to dogs (but may not eat) [Kodesh] meat that left the Azarah. The opposite case, Chulin slaughtered b'Azarah, one may not cast to dogs (it is Asur b'Hana'ah).
Refer to 22:30:4:2 and note.