Joel 2
11 Ref And the Lord is thundering before his forces; for very great is his army; for he is strong who gives effect to his word: for the day of the Lord is great and greatly to be feared, and who has strength against it?
12 Ref But even now, says the Lord, come back to me with all your heart, keeping from food, with weeping and with sorrow:
13 Ref Let your hearts be broken, and not your clothing, and come back to the Lord your God: for he is full of grace and pity, slow to be angry and great in mercy, ready to be turned from his purpose of punishment.