Study Berakhot folio 4B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
And if they explain this verse in accordance with the opinion of Rabban Gamliel who says that “when you lie down” refers to the entire night, then let the Rabbis also say that one may recite the evening Shema until dawn, in accordance with the opinion of Rabban Gamliel.
The Talmud answers: Actually, the Rabbis hold in accordance with the opinion of Rabban Gamliel, and the fact that they say until midnight is in order to distance a person from transgression. As it was taught in a baraita, the Rabbis created a “fence” for their pronouncements with regard to the rec
The baraita concludes with a warning: Anyone who transgresses the pronouncements of the rabbis is liable to receive the death penalty.
This is a startling conclusion. What is different in all other places that it is not taught that one is liable to receive the death penalty and what is different here that it is taught that he is liable to receive the death penalty? There is no unique stringency apparent in the rabbinic restriction
The Talmud offers two answers, explaining that the conclusion of the baraita essentially stems not from the magnitude of the transgression, but rather from concern that the “fence” created around this particular mitzva may be neglected. If you wish, say that one returning from work is quite anxious