This warning is from Gitten 57, the Gemara we learn on 9 Av. There the warning is be fearful of hard line actions against your fellow Jew, or inappropriate piety that can lead to Destruction.
This warning is from Gitten 57, the Gemara we learn on 9 Av. There the warning is be fearful of hard line actions against your fellow Jew, or inappropriate piety that can lead to Destruction.