(Exodus 12:46) "In one house shall it be eaten": R. Shimon b. Yochai says: In one group. You say in one group, but perhaps (the intent is) "in one house," literally? (This is not so, for) from (Ibid. 12:7) "of the houses where they eat it" I learn that it may be eaten in many houses." How, then, am I to understand "In one house shall it be eaten"? In one group — whence he ruled: The Pesach may be eaten in two places, but not in two groups.
Rabbi Shimon Ben Yochai Argued That One House Actually Means One
Mekhilta Tractate Pischa 15:12