English: ‘You shall not muzzle an ox’ – the prohibition of muzzling applies equally to an ox and to every domestic animal. What is the reason? We derive ‘ox’ from ‘ox’ in the Sabbath commandment.
On the daf / in context: Bava Kamma 54b extends the muzzling prohibition beyond the ox by gezerah shavah with the detailed list of animals in the Decalogue.
Type of Learning
Gezerah shavah (ox / ox) — R’ Yishmael #2.
What Is Learned
Although the verse names only an ox, the prohibition against muzzling while working applies to every domestic animal.