Why does the Torah insert the Mitzvah of Bikurim here?
Rashi: Still with reference to Pasuk 11, the Torah is teaching us that Bikurim applies even during the Sh'mitah.
Rashbam: When you go to the Beis Hamikdash for Aliyah le'Regel, make use of the opportunity and take your Bikurim 1 with you.
What are the connotations of "Reishis"?
Rashi: The Mitzvah applies to the first fruit that ripens on the tree.
Seforno: It means that Bikurim should be given from the best 1 of the first fruit to appear.
Which fruit does Bikurim comprise?
See Torah Temimah, note 132.
What are the implications of "Admascha"?
Bikurim, 1:1-2: It implies that the entire tree is growing from one's own field
What are the implications of "Tavi Beis Hashem ... "?
Bikurim, 1:5: It implies that the owner is responsible for the Bikurim (to replace them should they get lost or stolen, go bad or become Tamei) until he reaches the Beis-Hamikdash.
Oznayim la'Torah: "Bayis implies that Bikurim may only be brought to a structure of stone, not one of curtains. which explains why it was imperative to replace the current Mishkan with Mishkan Shiloh, which comprised stone walls and a curtain roof. 1 before the obligation to bring Bikurim fell due at the termination of the fourteen years of Yerushah and Yeshivah. 2
What does the Mitzvah of Bikurim entail?
Rashi: When one sees a fig (for example) that has ripened, one ties a red thread around it and declares it Bikurim, which one then takes to Yerushalayim and gives to a Kohen. 1
See the beginning of Ki Savo for more details.
What are the connotations of the La'av "Lo Sevashel G'di ba'Chaleiv Imo"?
Rashi and Ramban (in Re'ei, 14:21): The Torah presents it three times, once to prohibit eating meat cooked in its mother's milk, 1 once to forbid deriving benefit from it and once to prohibit cooking them together. 2
Seforno: Don't do acts such as these in order to obtain an abundance of fruit; Rather give Bikurim. 4
Targum Onkelos: It is a prohibition against eating meat and milk together.
Targum Yonasan: It is a prohibition against cooking and eating meat mixed with milk. 5
Moshav Zekenim: It is forbidden only if they were cooked together, but not if they were soaked together the entire day. 6
Hadar Zekenim #1: Do not delay [offering Bechoros] for them to nurse and mature; offer them immediately.
Hadar Zekenim citing Sefer ha'Gan: It is cruelty to cook meat with the milk from which it grew and lived. The Torah similarly forbids taking a mother bird with its young, and to slaughter a mother and her child on the same day.
Hadar Zekenim #2: Do not delay Bikurim to nurture on the tree, which is their 'mother'. Rather, bring them immediately. 'Gedi' is like 'mi'Meged'; or, it is anything soft.
Hadar Zekenim #3: If you bring Bikurim, the grain will not burn when it is soft and in Chelev ha'Aretz (its mother); if not they will burn then. Do not bring Bikurim when they are soft; wait for them to ripen.
Da'as Zekenim (34:26): This hints to the Isur [mid'Rabanan] to marry a woman nursing another man's baby, until 24 months. Rosh citing R. Sadya Gaon - the Gematriya of Tevashel is 730 (the number of days in two years; the Beis hints to) excluding the day of death 7 [of the father] and the day he is Mekadesh her. Moshav Zekenim (Devarim 14:21)
Refer to 23:19:6:2. The reason that the Torah presents the Isur Achilah and Hana'ah in a Lashon of Bishul is because min ha'Torah, it is only if they are cooked together that they are subject to the Isur Achilah snd Hana'ah. See also Ba'al ha'Turim in Re'ei.
How do we know to read the word "ba'Chaleiv Imo", and not "be'Cheilev Imo"?
Sanhedrin, 4b: Because "Lo Sevashel G'di ... " implies in the way that one normally cooks, and one does not normally cook meat in fat.
Why does the Torah write specifically "G'di"?
Rashi #1: Because 'G'di' is the term that incorporates all young, tender animals - which we learn from the fact that the Torah writes in Vayeishev, Bereishis, 27:9, in connection with Yehudah and Tamar "Vayishlach Yehudah es G'di ha'Izim", implying that "G'di" S'tam incorporates any animal.
Rashi #2 (in Devarim 14:21): It writes "G'di" three times, to preclude Chayos, birds and fish from the prohibition.
Ibn Ezra: Because it was common to cook a kid-goat in its mother's milk - since its meat is not moist.
Chulin, 113b: "On the one hand, "G'di" incorporates Cheilev, a Neveilah 1 and an embryo in the prohibition of Basar be'Chalav; on the other, it precludes a placenta and a non-Kasher animal from the prohibiton.
See Torah Temimah as to why Cheilev and Neveilah are not Halachah.
What are trhe implications of ba'Chaleiv Imo"
Chulin, 113b: It precludes cooking the milk of a male animal, of an animal that has been Shechted and of a non-Kasher animal from the prohibition of Basar be'Chalav. 1
Chulin, 114: It includes cooking the meat of an animal in the milk of different 2 cow or of a sheep and the a kid-goat in its own mother's milk.
Why does the Torah juxtapose "Lo Sevashel G'di ... " to "Tavi Beis Hashem Elokecha"?
Mechilta: To include Kodshim in the prohibition of Basar be'Chalav. 1
See Torah Temimah, note 139.
Why does the Torah insert meat and milk here, in connection with the Yamim-Tovim?
Rashbam: Because one tends to eat a lot of meat on Yom-Tov.
What is the connection between Bikurim and meat and milk?
Seforno: To teach us that, if one wants to enjoy a successful fruit harvest, the way to do it is by observing the Mitzvah of Bikurim (and Terumah), as the Pasuk writes in Yechezkel, 44:30, and not by indulging in various kinds of sorcery, such as cooking kid-goats in their mothers' milk.
Hadar Zekenim: Refer to 23:19:5:5,7,8.
Moshav Zekenim (34:26): Hashem commanded us to separate Bikurim, and forbade to us new grain until we bring the Omer and separate [its Kometz], so you must separate milk from meat, and while they are together, they are forbidden.
Why does the Torah repeat this La'av three times
Rashi #1 and Ramban Refer to 23:19:5:1.
Rashi #2 (in Re'ei, Devarim, 14:21): To preclude Chayos birds and fish from the Isur.
QUESTIONS ON RASHI
Rashi writes that meat and milk is written three times; one time forbids eating meat cooked in milk. We should know this already from "Lo Sochal Kol To'evah"!
Riva citing R. Elyakim: "Lo Sochal Kol To'evah" is La'av shebi'Chlalos (forbids many matters), so I would not lash due to it. Our verse obligates lashes for eating it.