Related על בבא קמא 113:11

"return shall you return them": If he returned it (the animal), and it ran away; returned it and it ran away — even four or five times — he must continue returning it, it being written "Return shall you return them." If he returned it to a place where it could be seen (by the owner), he need not deal with it. If it were stolen or lost, he is responsible for it — until he returns it to his (the owner's) domain, it being written "to your brother."