"An if an ox gore": This tells me only of an ox. Whence do I derive (the same for) all beasts? It follows, viz.: It is written here "ox," and elsewhere (in the second Decalogue, Devarim 5:14) "ox." Just as the "ox" of Sinai is equated with "all of your beasts," so, here, all beasts are to be equated with ox.