וַיֹּ֥אמֶר יְהוָ֖ה אֵלָ֑י מִצָּפוֹן֙ תִּפָּתַ֣ח הָרָעָ֔ה עַ֥ל כָּל־יֹשְׁבֵ֖י הָאָֽרֶץ׃
Then the LORD said unto me: ‘Out of the north the evil shall break forth upon all the inhabitants of the land.
Read halakhic rulings (Jewish law) on Jeremiah 1:14: and classical halakhic sources.