One erev Yom Kippur in Lubavitch, after Mincha, I saw the venerable chossid R. Pesach Kuper of Taganrog come out of the Rebbe’s room wearing a tallis and kittel, and saw that he had been crying. He had gone inside, he told me, to ask the Rebbe for his erev Yom Kippur blessing, and the Rebbe wanted to bentch him.
“I was privileged, ” he told the Rebbe, “that your grandfather and your father each placed their hand on my head when bentching me, and I ask you also to place your hand on my head when you bentch m e.”
R. Pesach concluded, “He put his hand on my head and burst into tears; both of us wept. ”