Talmud for Shabbat 187:3

“Ben Bathyra permits horses.” Rebbi Jehudah⁹⁷R. Jehudah ben Bathyra. said this only about a male horse because it kills [its owner] in war. Some say, because it runs after a female, and some say, because it stands still to urinate⁹⁸At this moment the horse will not obey its master and therefore be dangerous.. What is between them? A gelding. He who says because it runs after a female, [this one] does not run after a female. He who says because it stands still to urinate, this one also stands still to urinate. Rebbi Aḥa in the name of Rebbi Tanḥum bar Ḥiyya: If it gets old he binds it to the grindstone⁹⁹Then it is used like a beast of burden and the same restriction may apply as to the sale of cattle. Babli Avodah zarah 16a.. Rebbi Yose ben Rebbi Abun in the name of Rebbi Ḥuna: Ben Bathyra and Rebbi Nathan both said the same¹⁰⁰For the laws of Sabbath. Everybody agrees that “a living person carries himself’; it is permitted to carry a human baby from private to public domains. The rabbis restrict this to humans; R. Nathan explicitly and Ben Bathyra implicitly (Note 73) extend the rule to animals. Babli Šabbat 94a., as it was stated¹⁰¹Tosephta Šabbat 8:34 Babli Šabbat94a.: “If he carried domestic animals, wild animals, or birds, whether alive or dead, he is liable. Rebbi Nathan says, dead he is liable, alive he is not liable.” The rabbis hold that he is liable for a purification sacrifice and they answer him so¹⁰²Why do they object because of the use of old horses which only implies a violation of rabbinic rules but not to the possible use of a younger horse in hunting, which would violate biblical rules? It seems clear that in contrast to the Babli, the Yerushalmi does not consider riding on a horse on a Sabbath or a holiday as a violation.? They answer following his own argument. Following your argument, since you are saying because of rabbinic Sabbath prohibition, also we hold that if it gets old he binds it to the grindstone. Rebbi says, I am saying that it is forbidden for two reasons, as a weapon¹⁰³Which makes the seller of the weapon an accessory to murder before the fact. Babli 16a. and as a large animal. It was stated so: A large wild animal is like a large domestic animal¹⁰⁴A horse is considered a tamed wild animal, not domesticated by nature.. Who stated this? Rebbi. The words of the Sages: Rebbi Bisna, Ḥanin bar Abba in the name of Rav¹⁰⁵The Genizah text has the statement in the name of Rebbi Ḥiyya, Rav’s uncle and foremost teacher.: A wild animal is like a small¹⁰⁵The Genizah text has the statement in the name of Rebbi Ḥiyya, Rav’s uncle and foremost teacher. domestic animal.