כִּי־כֹה֙ אָמַ֣ר יְהוָ֔ה שְׁמָמָ֥ה תִהְיֶ֖ה כָּל־הָאָ֑רֶץ וְכָלָ֖ה לֹ֥א אֶעֱשֶֽׂה׃
For thus saith the LORD: The whole land shall be desolate; Yet will I not make a full end.
Read halakhic rulings (Jewish law) on Jeremiah 4:27: and classical halakhic sources.