Chabad.org — English translation + Rashi
Torah Temimah points to Horayos 13a (unit 1; single primary locus per emergency Core plan).
E-Daf.com — Horayos 13a
HebrewBooks / Shas PDF
English: “The first bull” — why say “the first”? That it should be first relative to the congregation’s bull.
Priority of mashiach bull over communal — when both the High Priest’s bull and the communal bull stand ready, the High Priest’s is offered first.
If the anointed kohen’s bull and the congregation’s bull are both ready for service, the High Priest’s bull is processed first. The verse’s designation of “the first bull” supplies this order of precedence between the two offerings.