משנה על מכות 2:2

A bee-hive:Rabbi Eliezer says: Behold, it is like land and a prozbul may be written [using it as security] and it is not susceptible to uncleanness while it remains in its place, and one who takes honey from it on Shabbat is liable. But the sages say: it is not like land, a prozbul may not be written [using it as security], it is susceptible to uncleanness while in its place, and one who takes honey from it on Shabbat is exempt.