Joel 2:21 Halakhah

אַל־תִּֽירְאִ֖י אֲדָמָ֑ה גִּ֣ילִי וּשְׂמָ֔חִי כִּֽי־הִגְדִּ֥יל יְהוָ֖ה לַעֲשֽׂוֹת׃

Fear not, O land, be glad and rejoice; for the LORD hath done great things.

Read halakhic rulings (Jewish law) on Joel 2:21: and classical halakhic sources.