כִּי־עַ֛ם בְּצִיּ֥וֹן יֵשֵׁ֖ב בִּירֽוּשָׁלִָ֑ם בָּכ֣וֹ לֹֽא־תִבְכֶּ֗ה חָנ֤וֹן יָחְנְךָ֙ לְק֣וֹל זַעֲקֶ֔ךָ כְּשָׁמְעָת֖וֹ עָנָֽךְ׃
For, O people that dwellest in Zion at Jerusalem, Thou shalt weep no more; He will surely be gracious unto thee at the voice of thy cry, When He shall hear, He will answer thee.
Read halakhic rulings (Jewish law) on Isaiah 30:19: and classical halakhic sources.