Reference for Zevachim 8:2
קָדָשִׁים בְּקָדָשִׁים מִין בְּמִינוֹ, זֶה יִקְרַב לְשֵׁם מִי שֶׁהוּא וְזֶה יִקְרַב לְשֵׁם מִי שֶׁהוּא. קָדָשִׁים בְּקָדָשִׁים, מִין בְּשֶׁאֵינוֹ מִינוֹ, יִרְעוּ עַד שֶׁיִּסְתָּאֲבוּ, וְיִמָּכְרוּ, וְיָבִיא בִדְמֵי הַיָּפֶה שֶׁבָּהֶן מִמִּין זֶה, וּבִדְמֵי הַיָּפֶה שֶׁבָּהֶן מִמִּין זֶה, וְיַפְסִיד הַמּוֹתָר מִבֵּיתוֹ. נִתְעָרְבוּ בִבְכוֹר וּבְמַעֲשֵׂר, יִרְעוּ עַד שֶׁיִּסְתָּאֲבוּ, וְיֵאָכְלוּ כִּבְכוֹר וּכְמַעֲשֵׂר. הַכֹּל יְכוֹלִין לְהִתְעָרֵב, חוּץ מִן הַחַטָּאת וּמִן הָאָשָׁם:
[If] consecrated animals [became mixed up] with [other] consecrated animals of the same type, this one is offered for one of the individuals and that one is offered for one of the individuals. [If] consecrated animals [became mixed up] with [other] consecrated animals of a different type - they graze until they become blemished, and then they are sold. And one brings [new animals] equal in value to the most valuable among them for each of the two types, and suffers the difference in value from his own holdings. If they [the animals] became mixed up with a <i>Bechor</i> [first-born offering] or a <i>Ma'aser</i> [animal tithe] - they must graze until they become blemished, and then they are eaten according to [the rules governing] a <i>Bechor</i> or a <i>Ma'aser</i>. All types [of animals designated for sacrifice] can become mixed up, except for the <i>Chatat</i> and the <i>Asham</i> [offerings brought to alleviate guilt].