Above (in Pasuk 17), the Torah wrote "al Dam ha'Asham" Why does it say here "al M'kom Dam ha'Asham"?
Rashi: To teach us that the Kohen must place the oil on the location of the blood even if the blood has been wiped off, 1 since it is not the blood that counts, but the location of the blood. Consequently, if the Kohen places the oil before placing the blood, it is invalid (Rashi, Zevachim 43a).
Menachos,10a: Had the Torah written only "al Dam ha'Asham",we would have thought if the blood has been wiped away, he does not place the blood; and if it had only written "al M'kom Dam ha'Asham", we wojuld have thought that if the blood is still there, it is a Chatzitzah and it must be removed.
Daf Al ha'Daf (Menachos 15b, citing R. Shlomo ha'Kohen): Why the Torah did not teach this Chidush above (in Pasuk 17) regarding Mitaher Ashir? Lechatchilah one should bring the oil the same day, and the blood is intact. An Ashir can do so. Often, an Oni cannot bring it the same day.
