Parashas Bechukosai · Aliyah 1 · Passuk 4 · Unit 1
Chabad.org — English translation + Rashi
Torah Temimah cites Toras Kohanim: “your rains” — of your land, not of all lands.
English: “I will give your rains” — your rains, not the rains of all lands: that there will be plenty in Eretz Yisrael and famine in other lands, and they will come and buy from you and enrich you.
Possessive / pronominal derasha on the suffix of gishmeichem.
The blessing is localized and preferential: the rains (and resulting abundance) belong to Israel’s land, creating economic advantage when surrounding lands lack rain.