906 - The Rebbe is expressing gratitude for not forgetting about the Chasid who was a shochet

The Rebbe makes an association between the fact that Rabbi Yolas was a Kohen and the idea that the laws of not removing the mitzvah from your mind originate from a Kohen's obligation. https://www.torahrecordings.com/rebbe/004_igros_kodesh/adar/906