אֶ֣לֶף אֶחָ֗ד מִפְּנֵי֙ גַּעֲרַ֣ת אֶחָ֔ד מִפְּנֵ֛י גַּעֲרַ֥ת חֲמִשָּׁ֖ה תָּנֻ֑סוּ עַ֣ד אִם־נוֹתַרְתֶּ֗ם כַּתֹּ֙רֶן֙ עַל־רֹ֣אשׁ הָהָ֔ר וְכַנֵּ֖ס עַל־הַגִּבְעָֽה׃
One thousand shall flee at the rebuke of one, At the rebuke of five shall ye flee; Till ye be left as a beacon upon the top of a mountain, And as an ensign on a hill.
Read halakhic rulings (Jewish law) on Isaiah 30:17: and classical halakhic sources.