וְעַתָּה֙ אַל־תִּתְלוֹצָ֔צוּ פֶּֽן־יֶחְזְק֖וּ מֽוֹסְרֵיכֶ֑ם כִּֽי־כָלָ֨ה וְנֶחֱרָצָ֜ה שָׁמַ֗עְתִּי מֵאֵ֨ת אֲדֹנָ֧י יְהוִ֛ה צְבָא֖וֹת עַל־כָּל־הָאָֽרֶץ׃
Now therefore be ye not scoffers, Lest your bands be made strong; For an extermination wholly determined have I heard from the Lord, the GOD of hosts, Upon the whole land.
Read halakhic rulings (Jewish law) on Isaiah 28:22 from the Mishneh Torah and classical halakhic sources, free online.