לְהַעֲל֤וֹת חֵמָה֙ לִנְקֹ֣ם נָקָ֔ם נָתַ֥תִּי אֶת־דָּמָ֖הּ עַל־צְחִ֣יחַ סָ֑לַע לְבִלְתִּ֖י הִכָּסֽוֹת׃ (פ)
내가 그 피를 말간 반석 위에 두고 덮이지 않게 함은 분노를 발하여 보응하려 함이로라
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.