R. Yochanan citing R. Yanai: When one acquires a pit from his friend, when he hands him the bucket, his friend acquires it.

R. Yehoshua ben Levi citing Raish Lakish: When one acquires sheep from his friend, when he hands him the maschuchis, his friend acquires it.

Question: What is a maschuchis?

Answer: Some say it is a stick; some say a drum (used to lead the flock) and some say a senior goat, that all of the sheep follow.

Raish Lakish citing Bar Kafra: When one sells a burial plot to his friend, when he buries one person in a crypt, he gains a chazakah on the entire crypt.

If he buried three people there in three crypts, he gains a chazakah on the entire plot.