Charles Ellicott Commentary Joel 2:21

"Fear not, O land, be glad and rejoice; for Jehovah hath done great things." — Joel 2:21 (ASV)

Fear not, O land ...—The decree of the reversal of judgment has been proclaimed, and all nature—animate and inanimate, rational and irrational—which had been included in the curse is summoned to rejoice in the blessing bestowed by the Lord.