Parashas Acharei Mos · Passuk 16:10
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “Shall be stood alive” — until the time of the blood applications of its fellow [the goat to Hashem].
Alive until partner’s blood service
The Azazel goat must remain alive at least until the chatas-goat’s blood service is complete; if it dies earlier, a replacement is required.