And so shall you do with his donkey, and so shall you do with his garment, and so shall you do with every lost item of your brother’s that he loses and you find; you shall not be able to hide yourself.
English: “With his garment” — just as a garment is distinctive in that it has identifying marks and has claimants, so too everything that has identifying marks and has claimants.
On the daf / in context: The example of a garment is used to define the category of lost objects that must be returned: those that bear simanim and whose owners are still seeking them.
Type of Learning
Binyan av / comparison from the specific case of a garment.
What Is Learned
Only lost objects that have identifying marks and whose owners are still searching for them fall under the biblical obligation of return.