Reference for Bava Batra 40:2

It was stated: In truth, they permitted for wine even though it diminishes it because it improves it⁴⁸Tosephta 1:4, Babli 20b.. Rav Hoshaia when he heard this statement put his wine in the attic of the bath house. His wine became foul-smelling. He said, the Mishnah led me astray. But the Mishnah did not lead him astray; the smell of the bath house made his wine foulsmelling⁴⁹The Babli endorses the opinion that the Mishnah be valid only for Palestinian, not Babylonian wines..