Joel 2:11-15

11The Lord utters his voice before his army, for his camp is exceedingly great; he who executes his word is powerful. For the day of the Lord is great and very awesome; who can endure it?

12"Yet even now," declares the Lord, "return to me with all your heart, with fasting, with weeping, and with mourning;

13and rend your hearts and not your garments." Return to the Lord your God, for he is gracious and merciful, slow to anger, and abounding in steadfast love; and he relents over disaster.

14Who knows whether he will not turn and relent, and leave a blessing behind him, a grain offering and a drink offering for the Lord your God?

15Blow the trumpet in Zion; consecrate a fast; call a solemn assembly;