Reference for Tahorot 6:7

הַבִּקְעָה, בִּימוֹת הַחַמָּה, רְשׁוּת הַיָּחִיד לְשַׁבָּת וּרְשׁוּת הָרַבִּים לַטֻּמְאָה. וּבִימוֹת הַגְּשָׁמִים, רְשׁוּת הַיָּחִיד לְכָךְ וּלְכָךְ:

A valley in the summer time is a private domain regarding [matters of carrying on] Shabbat and it is a public domain regarding [matters of purity and] impurity; and in the rainy season it is a private domain regarding both of them.

Jastrow

Jastrow

Jastrow