Reference for Kilayim 8:2
בְּהֵמָה עִם בְּהֵמָה וְחַיָּה עִם חַיָּה, בְּהֵמָה עִם חַיָּה וְחַיָּה עִם בְּהֵמָה, טְמֵאָה עִם טְמֵאָה וּטְהוֹרָה עִם טְהוֹרָה, טְמֵאָה עִם טְהוֹרָה וּטְהוֹרָה עִם טְמֵאָה, אֲסוּרִין לַחֲרֹשׁ וְלִמְשֹׁךְ וּלְהַנְהִיג:
A domesticated animal with another [species of] domesticated animal, a wild animal with another [species of] wild animal, a domesticated animal with a wild animal, a wild animal with a domesticated animal, an unclean [a domesticated or wild animal that are forbidden to be eaten] with an unclean, a clean with a clean, an unclean with clean, a clean with a unclean, [with all these pairs] it is prohibited to plow [with them when they are harnessed together], to pull [with them] and to drive them [even if they are not pulling anything].