It’s an open Gemora in Sanhedrin Perek 12 that anyone can look up that somebody who says that people who just sit and learn don’t contribute to the klal are apikorsim.
I highly doubt it’s in Perek 12.
In any event, I repeat my request from above and ask for a cite. In other words, please advise where the gemara is (the daf and side would be helpful).
The Wolf