The Galanta Rov zy”a related that during the tish of Rav Yissochor Dov of Belz zy”a on Shavuos, the Rebbe spent a lot of time telling stories about the Besht, in honor of his Yahrzeit.
Present at the tish were a number of Yidden from Oberland, who whispered to each other, “Shouldn’t we be saying Tikkun Leil Shavuos now?”
The Belzer Rov realized what they were saying. He stood up and said, “The biggest tikkun in the world is to tell stories about tzadikim!”