Joel 2:13

10 The earth is troubled before them and the heavens are shaking: the sun and the moon have become dark, and the stars keep back their shining:

11 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 But even now, says the Lord, come back to me with all your heart, keeping from food, with weeping and with sorrow:

13 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.

14 May it not be that he will again let his purpose be changed and let a blessing come after him, even a meal offering and a drink offering for the Lord your God?

15 Let a horn be sounded in Zion, let a time be fixed for going without food, have a holy meeting:

16 Get the people together, make the mass of the people holy, send for the old men, get together the children and babies at the breast: let the newly married man come out of his room and the bride from her tent.