Rashi on Leviticus 21:23/רש"י על ויקרא כ״א:כ״ג

1אך אל הפרכת ONLY [HE SHALL NOT GO IN] UNTO THE PARTITION VEIL for the purpose of applying the seven sprinklings which are to be made upon the partition vail (cf. Leviticus 16:17).

2ואל המזבח [NOR SHALL HE COME NIGH] UNTO THE ALTAR — i. e. the outer altar. Both (פרכת and מזבח) must be mentioned here and the reason is explained in Torath Cohanim (Sifra, Emor, Chapter 3 10).

3ולא יחלל את מקדשי THAT HE PROFANE NOT WHAT IS HOLY TO ME — Consequently, if he performs the service it is profaned and thus becomes invalid (Sifra, Emor, Chapter 3 11).