Why does the Torah insert the words "la'Shor ha'Echad"?
1.
Menachos, 91b: Based on the fact that the moment ia calf is born it is called a 'Shor', it teaches us that, as opposed to a sheep, where the Nesech of a lamb is different than that of a ram, the Nesech of a bull is no different than that of a calf.
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See Torah Temimah, note 20. This D'rashah and the D'rashos in 15:11:2 & 4 seem to be based on the fact that the Torah refers to Shor, Ayil and Seh without drawing a distinction between the two animals that they incorporate - as opposed to Seh and Ayil.
2)
Why does the Torah insert the word "la'Ayil ha'Echad"?
1.
Menachos, 91b: To teach us that, although the Nesech of a lamb differs form that of a ram, once it becomes a ram, there is no difference between the Nesech of a two-year old sheep and a one of three years.
3)
What is the definition of "Seh"?
1.
Rashi: A "Seh"
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is a lamb or a kid-goat in its first year.
Why does the Torah insert "O la'Seh ba'Kesavim O ba'Izim"?
1.
Menachos, 91b: To teach us that, although the Nesech of a lamb differs form that of a ram, there is no difference between the Nesech of a female lamb and a ewe,
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or between the Nesech of a kid-goat and a he -goat.
2
Rashi writes that a 'Seh' is in its first year. But in Bechoros, he explains that even after that it is still called a Seh?
1.
Tiferes Yisrael (Chomer ba'Kodesh 2:5): Regarding Korbanos, "Seh" is a yearling, whereas the Gemara in Bechoros is discussing a Seh for Pidyon Peter Chamor
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- PF)
