1)
"O la'Ayil"? What is the (otherwise superfluous) word "O" coming to include?
1.
Rashi #1: It means simply - 'And if his Korban is a ram ... '.
2.
Rashi #2: It incorporates a Palgas (a sheep between the ages of 12
1
and 13
2
months in the Din of Nesachim.
3
3.
Menachos, 91b: It incorporates the Ram of Aharon (the Kohen Gadol) on Yom Kipur in the Din of Nesachim.
4
1
When it is still called a 'Seh'.
2
When it is called an 'Ayil'. See Oznayim la'Torah on Pasuk 11, as to why the Torah draws this distinction exclusively by a lamb and a ram.
3
Chulin, 23a: Even though the animal itself cannot be brought on the Mizbe'ach.
4
See Torah Temmah, note 15.