אֲשֶׁ֣ר ׀ אָמַ֣ר אֲלֵיהֶ֗ם זֹ֤את הַמְּנוּחָה֙ הָנִ֣יחוּ לֶֽעָיֵ֔ף וְזֹ֖את הַמַּרְגֵּעָ֑ה וְלֹ֥א אָב֖וּא שְׁמֽוֹעַ׃
To whom it was said: ‘This is the rest, Give ye rest to the weary; And this is the refreshing’; Yet they would not hear.
Read halakhic rulings (Jewish law) on Isaiah 28:12: and classical halakhic sources.