תלמוד על בבא בתרא 2:2

It is forbidden to store away in anything which one has to distance from a wall²⁵Mishnah Bava Batra 2:1. Any chemically active material cannot be stored close to a wall shared with another owner.. Rebbi Yose said, since we have stated that one may store away in straw, it follows that one need not distance it from a wall. Rebbi Ḥaggai objected: Was it not stated, one who rents o house from his neighbor may not use it as storage for produce? Why? Not because of the chaff? Rebbi Ḥanania said, because of the rats. Rebbi Phineas ben Rebbi Ḥanina said, if it were because of the rats then even a storage for anything. Rebbi Shammai objected, does one not distance rocks from the wall? Then rocks are forbidden to hide away in. Rebbi Yose said, it is not that rocks produce heat but they become rusty and destroy the bottom of the wall²⁶Bava Batra 2:1, Note 12.. But was it not stated: One does not store away in stones. Explain it for silver ore. There are Tannaim who state, one does store in rocks, and there are Tannaim who state, one does not store. Rav Ḥisda said, he who says “one stores”, with gold or brass ore; he who says “one does not store”, with silver ore²⁷Quoted Tosaphot Bava Batra 17a s.v.סלעים..