אֲהָ֖הּ לַיּ֑וֹם כִּ֤י קָרוֹב֙ י֣וֹם יְהוָ֔ה וּכְשֹׁ֖ד מִשַׁדַּ֥י יָבֽוֹא׃
Alas for the day! For the day of the LORD is at hand, And as a destruction from the Almighty shall it come.
Read halakhic rulings (Jewish law) on Joel 1:15: and classical halakhic sources.