Why does the Pasuk mention 'Yekidah' four times ("Mokdah", "Tukad bo", "Tukad bo" and "Tukad al ha'Mizbe'ach") from Pasuk 2 until Pasuk 6?
Rashi: It is the source of the Machlokes in Yoma, Daf 45a, as to how many Ma'arachos there were on the Mizbe'ach. 1
Refer to 6:2:156:1.
Oznayim la'Torah: With reference to the previous Pesukim, the simple P'shat in "ve'ha'Eish al ha'Mizbe'ach Tukad bo Lo Sichbeh" is that, when arranging the Ma'arachos on the Mizbe'ach and removing the ashes, the Kohanim should take care not to extinguish the fire on the Mizbe'ach.
Four, according to the maximum opinion - 1. The Ma'arachah Gedolah; 2. the Ma'arachah Sheniyah, containing the two blocks of wood (Refer to 6:5:2:1), to ensure that the Ma'arachah burns constantly; 3. The Ma'arachah shel Ketores; 4. The Ma'arachah on which they burned the limbs that, for some reason or other, had not yet burned (Sifsei Chachamim). Refer also to 6:5:1.1:1.
What does "ve'ha'Eish" come to include?
Yoma, 45b: It comes to include an additional Ma'arachah on Yom Kipur for the Ketores of Yom Kipur.
What are the "Eitzim" that the Kohen places on the fire-pile?
What are the implications of the word "u'Bi'er alehah Eitzim ... "?
Yoma, 33a: To teach us that the arrangement of the woodpile of the Ketores precedes that of the two blocks of wood. 1
And the arrangement of the two blocks of wood precedes the removal of ashes from the Mizbe'ach ha'Penimi. See Torah Temimah citing Yoma, 33a #2.
What is the definition of "Boker"? Until when may the Tamid be brought?
Targum Yonasan: "Boker" is until four (seasonal) hours have passed (a third of the day). 1
Like the opinion of R. Yehudah in B'rachos, 26b.
Why does the Torah repeat the word "ba'Boker"?
Yerushalmi B'rachos, 1:4: To teach us that, in the realm of Kodshim, day begins at dawnbreak, instead of sunrise as it does in other areas of Halachah. 1
See Torah Temimah, note 34.
Why does the Torah add the (otherwise superfluous) phrase "ve'Arach alehah ha'Olah"?
Sifra: To teach the Kohanim o arange one large-size Ma'arachah on the Mizbe'ach to accomodate all the Olos that are being brought.
What are the implications of the word "ve'Arach Alehah ha'Olah"?
Rashi Yashan: Based on the 'Hey' at the beginning of the word, it implies importance; to teach us that the Olas Tamid is always the first Korban to be brought each morning. 1
See Sifsei Chachamim.
Which Shelamim is the Pasuk referring to?
Rashi: It is referring to Shalmei Nedavah, in the event that they need to be sacrificed.
Why does the Torah insert the word "Alehah" in the phrase "ve'Hiktir alehah Chelvei ha'Shelamim"?
Rashi: To teach us that, if Shelamim are brought, they must be brought after the Tamid shel Shachar ('Alehah Hashlem Kol ha'Korbanos Kulam'), and not after the Tamid shel bein ha'Arbayim. 1
In other words, the Korban Tamid shel bein ha'Arbayim is the last Korban to be brought each day. Moshav Zekenim: Even though in Vayikra, 3:5, we learned this from "Al ha'Olah asher al ha'Eitzim", and in Zevachim, 89a, the Gemara learned it from "Mil'vad Olas ha'Boker", ?ha'Olah? teaches us that it is the first Korban to be Shechted, whereas "Mil'vad Olas ha'Boker" teaches us that it is the first Korban to be brought on the Mizbe'ach
How will we reconcile "ve'Hiktir alehah Chelvei ha'Shelamim" (which prohibits bringing any Korban after the Tamid shel bein ha'Arbayim) with the Pasuk in Mishpatim, Sh'mos 23:18 "ve'Lo Yalin Cheilev Chagi ad Boker" (implying that why is permitted to place Evarim and Chalavim on the Mizbe'ach all night)?
Pesachim, 59b: The Pasuk in Mishaptim is speaking about Evarim and Chalavim that were left over from Korbanos whose blood was spinkled before the Tamid shel bein ha'Arbayim.
What are the connotations of the word "ve'ha'Eish"?
Moshav Zekenim: It says so in two other places - "veha'Eish Yardah me'ha'Shamayim" (Divrei ha'Yamim 2 7:1), and "me'ha'Eish Yatza'u ve'ha'Eish Tochlem" (Yechezkel 15:7). This hints that Nadav and Avihu did not sin by bringing fire, even though fire comes from Heaven, and that they were liable for ruling in front of their Rebbe. 1
QUESTIONS ON RASHI
Rashi writes that ha'Olah teaches that the Olas Tamid must be the first Korban each day. But in Vayijra, 3:5, we learned this from "Al ha'Olah asher al ha'Eitzim", and in Zevachim, 89a, the Gemara learned it from "Mil'vad Olas ha'Boker"?
Moshav Zekenim: ha'Olah teaches us that it is the first Korban to be Shechted, whereas "Mil'vad Olas ha'Boker"teaches us that it is the first Korban to be brought on the Mizbe'ach. 1
Moshav Zekenim (citing R. Chaim Kohen): From "ha'Olah" we learn precedence only when both of them are Tadir - for example, the Tamid precedes the Minchas Chavitin Chavitim. 2