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ישמעו ויראו. מִכָּאן שֶׁצְּרִיכִין הַכְרָזָה – אִישׁ פְּלוֹנִי וּפְלוֹנִי נֶהֱרָגִין עַל שֶׁהוּזַמּוּ בְּבֵית דִּין (סנהדרין פ"ט): ישמעו ויראו [AND THOSE WHO REMAIN] SHALL HEAR AND FEAR — From here we derive the law that a public announcement is required: “The men named so-and-so are to be executed because they have been convicted by the court as “plotting witnesses” (Sanhedrin 89a).