Chabad.org — English translation + Rashi
Torah Temimah points to Kiddushin 57b.
E-Daf.com — Kiddushin 57b
HebrewBooks / Shas PDF
English: “And he shall slaughter it” — slaughter is valid by a non-kohen.
Zar may perform shechitah — slaughter of shelamim need not be performed by a kohen.
Shechitah of shelamim need not be by a kohen. The Torah’s “and he shall slaughter it” is read as permitting a non-kohen (zar) to perform the slaughter, while the blood service remains a kohen-only act. The contrast between the unrestricted subject of the shechitah verb and the explicit “sons of Aharon” for the zerikah establishes the distinction in the law.