רֵאשִׁ֗ית בִּכּוּרֵי֙ אַדְמָ֣תְךָ֔ תָּבִ֕יא בֵּ֖ית יְהוָ֣ה אֱלֹהֶ֑יךָ לֹא־תְבַשֵּׁ֥ל גְּדִ֖י בַּחֲלֵ֥ב אִמּֽוֹ׃ (פ)
Yang pertama dari hasil pertama tanahmu haruslah kaubawa ke rumah Yang Mahakekal, Allahmu. Janganlah engkau memasak anak kambing dalam susu induknya.”
Bartenura
והביכורים – As it is written (Exodus 23:19), “The choice first fruits of your soil you shall bring to the house of the LORD your God…”(see also the exact same formulation in Exodus 34:26, which is the chapter source for the next Biblical quote), and the Torah did not provide for them a [fixed] measure.
Haamek Davar
This book is called Mishneh Torah. And at the beginning to tractate Gittin, Tosafos writes that Mishneh Torah denotes that [this Book] “only recapitulates and repeats what was stated previously [in the other four Books].” 1Gittin 2a; Tosafos, s.v. Ha’meivi Get. Thus Mishneh Torah is to be translated as “Repetition of the Torah.” The Ramban of blessed memory is so convinced of this understanding [of Mishneh Torah] that when he addresses the mitzvos listed in the parashios of Shoftim2`For example, in Deut. 16:18, “You shall set up judges and law enforcement officials for yourself in all your cities” is explanatory of the implied directive of requiring judges as stated in Ex. 22:8, “The word of both parties shall come before the judges” and Ibid. 21:22, “he shall pay as the judges determine.” An additional example is Deut. 19:14, “You shall not remove your neighbor’s landmark,” which he considers to be part of [i.e. explanatory] of Num. 26:56, “According to the lot shall one’s inheritance be divided between the numerous and the few.” and [Ki] Seitzei,3An additional example to what is cited immediately below is that Deut. 22:8, “you shall make a guard rail for your roof” is deemed explanatory of Lev. 19:16, “You shall not stand idly by [the shedding of] your fellow's blood.” he explains some of them as being part and parcel of mitzvos written earlier. [And he applies this understanding] to the extreme by considering the mitzvah of shi’luach ha’kein (sending away the mother bird),4See Deut.: 22:6-7, “If a bird's nest chances before you on the road, on any tree, or on the ground, and [it contains] fledglings or eggs, if the mother is sitting upon the fledglings or upon the eggs, you shall not take the mother upon the young. You shall send away the mother, and [then] you may take the young for yourself, in order that it should be good for you, and you should lengthen your days.” to be part of the mitzvah of oso v’es b’no, (the prohibition of slaughtering the mother and her calf in the same day).5Lev. 22:28 states, “An ox or sheep you shall not slaughter it and its offspring in one day.” The Ramban on Deut. 22:6 writes, “[The sending away of the mother bird] is also an explanatory commandment of oso v’es b’no because the reason for both [commandments] is that we should not have a cruel heart and be discompassionate, or it may be that Scripture does not permit us to destroy a species altogether, although it permits slaughter [for food] within that group. Now, he who kills the mother animal and the young in one day or takes them when they are free to fly [is regarded] as though he cut off that species.” And in my opinion, this is astonishing, for these two mitzvos are entirely different. Moreover, we also find a duplication of the mitzvos in the Book of Exodus: In the parasha of Ki Sissa beginning with the verse, “Beware of what I command you today,” 6Ex. 34: 11. until “Do not cook a kid in its mother’s milk,”7Ibid. Verse 26. The following directives and mitzvos listed in these verses are also found in the Torah reading of Mishpatim: Not to make a covenant with the seven nations that are to be driven from the Land of Israel; to destroy their altars and places of worship; not to make idols nor to worship them; to work for six days and rest on the Sabbath; the celebration of the three festivals; the redeeming of the first sons; the redeeming of the firstborn of kosher animals and of the donkey; appearing three times a year at the Temple (including how God will protect their land when it is abandoned, in order to appear in the Temple three times a year); not to offer the Passover sacrifice while possessing leaven, and not to cook a kid in its mother’s milk. it is a repetition of what was already written in the parasha of Mishpatim.8See Ibid. 23:12-33. We explained there with God’s assistance how none [of those words] are superfluous – Heaven forbid [that one should say so].9According to the Ramban, following the sin of the Golden Calf, Israel is warned of the importance of fulfilling the commandments to safeguard their spiritual greatness; and to achieve this end, these prohibitions and commandments were repeated in particular. To quote the Ramban to Ibid. 34:14: “Observe the commandments which I command you today, and do not treat them as you have treated those which I commanded you at first, when you violated everything by worshiping the idols.” Thus, due to the significance of certain events (i.e. the making of the Golden Calf and the impending possession of the Land of Israel), mitzvos of particular importance may be repeated in the Torah to communicate a special exhortation and message. The Netziv strongly disagrees with this approach and argues that the primary purpose of the repetition of any mitzvah is to provide an additional halachic insight. And accordingly in the Book of Devarim one does not find that many duplicated mitzvos and whatever [seem to be] repeated are not considered – Heaven forbid – to be superfluous.
Rashi
כל תועבה [THOU SHALT NOT EAT] ANY ABOMINATION — i.e. anything that I have declared to be an abomination to you (which in itself may not be an abominable thing) — as for instance if one deliberately makes a slit in the ear of a firstborn animal (thus making it unfit for sacrifice) so that one may slaughter it in the country (i.e. outside Jerusalem) and eat it there. Here you have a thing I declared to be an abomination to you, in that I commanded you (Leviticus 22:21) “one shall cause no blemish to be therein”. Scripture now comes and teaches you here that one should not slaughter such an animal and eat it, on account of that blemish. Another example: If one boils meat in milk — here you have a thing that I have declared to be an abomination to you (cf. Exodus 23:19; Exodus 34:26; Deuteronomy 14:21), and here it lays down the prohibition about eating it (Chullin 114b).