During a speech on Shabbat, when the Torah portion Yitro was read in the year 5750 (February 17, 1990), the Rebbe, King Moshiach, said:
It is worthwhile to increase and enhance the fulfilment of the mitzvah of giving charity in connection with the anniversary of her passing. And it is good if the donated amount is a multiple of 470 — the numerical value (gematria) of the Rebbetzin’s name.
Following the passing of the Rebbetzin on the 22nd of Shevat, and with the Rebbe’s blessing, the Lubavitch yeshivas were named Nefesh Chaya in her memory.