Le Lévitique 16:10 Références de la Michna : Mishnah Yoma & Mishnah Zevachim

The two goats of Yom Hakkippurim: it is a requirement that they be alike in appearance, in size, in value, and that they be bought at the same time. But if they are not alike they are still valid. If he bought one today and the other tomorrow, they are valid. If one of them died before the lot was cast another one is bought for the second one. But [if one of them died] after the lot was cast another pair must be bought and he must cast lots for them over again. If the one that ‘For Hashem’ died, he [the high priest] should say: “This one upon which the lot ‘For Hashem’ has fallen stands in its stead.” And if the one that was ‘For Azazel’ died he should say: “This one upon which the lot ‘For Azazel’ has fallen stands in its stead.” The other one is left to pasture until it becomes blemished and it is to be sold and its value goes to the [chest for] voluntary offerings, for the sin-offering of the congregation is not be left to die. Rabbi Judah says: it is left to die. Furthermore Rabbi Judah said: if the blood was poured away, the goat which is to be sent away is left to die. If the goat to be sent away died the blood is poured.

If one slaughtered the hatat cow [the red heifer] outside its appointed place, and likewise if one offered the scapegoat [of Yom Kippur] outside, he is not liable, because it says, “And has not brought it unto the door of the Tent of Meeting,” (Leviticus 17:4): whatever is not eligible to come to the door of the Tent of Meeting, one is not liable on its account.