Midrasch zu Dewarim 13:12
וְכָל־יִשְׂרָאֵ֔ל יִשְׁמְע֖וּ וְיִֽרָא֑וּן וְלֹֽא־יוֹסִ֣פוּ לַעֲשׂ֗וֹת כַּדָּבָ֥ר הָרָ֛ע הַזֶּ֖ה בְּקִרְבֶּֽךָ׃ (ס)
Und ganz Israel wird hören und fürchten und keine solche Bosheit mehr tun, wie dies inmitten von dir ist.
Sifrei Devarim
(Devarim 13:12) "And all of Israel shall hear and see": He (the inciter) is confined until the festival (when all come to Jerusalem), and he is put to death on the festival, as it is written "And all of Israel shall hear and see." These are the words of R. Akiva.
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