When he was eight or nine, Levi Markel would often go to receive a dollar from the Rebbe on Sundays. One Sunday, after receiving a dollar for himself, he told the Rebbe that the day was his brother’s birthday. The Rebbe gave him a second dollar and told him: “This is for Moshie.”

At the time, Levi did not think this was anything special, but afterwards it struck him. That the Rebbe remembered Moshie's name without being reminded was out of the ordinary, yet understandable. But Levi had two other brothers besides Moshie. How did the Rebbe know it was Moshie's birthday?