Rav Refoel Kahn, father of the Rebbe’s chozer, Rav Yoel Kahn, once told how once the Rebbe Rayatz was invited to a Melave Malka in the year tov-reish-tzadi in the USA.
At the Melave Malka, two gevirim (wealthy Jews) were present and the Rebbe Rayatz gave each of them a silver matbei’a, a coin given as a segula for shemira and berocha. To one of the gevirim he gave instructions that he should carry the matbei’a on his person at all times. To the other he told him that he should sew the matbei’a onto his tallis kotton (his tzitzis garment).
Everyone present was surprised and amazed as to the reason behind the Rebbe Rayatz’s different instructions to each of the gevirim, until they compared notes. One said, “Now, isn’t that puzzling – the Rebbe told me to sew this coin onto my tallis kotton, but I don’t even wear one!”
Then they all realized the intention behind the Rebbe’s holy instruction. (Shemuos Vesippurim III, p. 222 #123)
