בֶּן־אָדָ֕ם שִׂ֥ים פָּנֶ֖יךָ אֶל־הָרֵ֣י יִשְׂרָאֵ֑ל וְהִנָּבֵ֖א אֲלֵיהֶֽם׃
인자야 너는 이스라엘 산을 향하여 그들에게 예언하여
Mishnah Rosh Hashanah
Originally they used to light torches [to signal that the new month had been decreed]. When the Samaritans disrupted this, they decreed that messengers should go out.