Rebbe Yisrael of Chortkov zt'l teaches, "Every Shabbos of the four parshiyos brings bounty to the world. On parashas Shekalim, the bounty for parnassah and wealth come to the world."
The Ateres Yeshuah (Moadim, Mishpatim, Shekalim) writes, פרנסה להמשכת מסוגל שקלים שבת, "Shabbos Shekalim is mesugal for attaining parnassah."
The Imrei Yosef of Spinka zt'l taught that this Shabbos is mesugal for tefillos to be answered. He explains that the shekalim (which were donated to the Beis HaMikdash at this time of year) covered the cost of the korban tamid for the entire year. Chazal (Brachos 26:) say, תקנום תמידין כנגד תפלות, "The tefillos correspond to the korban tamid." So, this Shabbos is mesugal for tefillos to be answered.
The brothers Reb Meir and Reb Zanvil Kahana z'l from Drogmeresht came to the Imrei Yosef of Spinka for Shabbos Shekalim in the year 5643. It was their first time by this great tzaddik, and they hoped they would get their salvation there, as both were baalei yesurim.
Reb Meir spoke to the Imrei Yosef on erev Shabbos. He told him that he didn’t have children and that his wife was ill. The Imrei Yosef told him to give a pidyon of one hundred gold coins, and he would have a yeshuah.
There wasn't enough time for Reb Zanvil to speak to the Rebbe on erev Shabbos. At the Friday night tish, the Rebbe blessed Reb Zanvil that his children should have a refuah sheleimah. The Rebbe added that on Shabbos Shekalim, one can request that all one's tefillos be answered. (He told them the explanation we wrote above, that this Shabbos is mesugal for tefillos to be answered.)
Both brothers had their salvation and became devoted chassidim of the Imrei Yosef.
