English: “You shall surely return them to your brother” — to include [returning it to] a trustworthy person [when the owner is not found].
On the daf / in context: The Sages derive that if the owner cannot be located, the finder may entrust the animal to a reliable person until the owner is found.
Type of Learning
Expansive derash (ribbui) on the phrase “to your brother.”
What Is Learned
When the owner is not immediately available, the finder may fulfill the mitzvah by placing the animal in the care of a trustworthy person.