Joel 2:12-17

12Yet even now, saith Jehovah, turn ye unto me with all your heart, and with fasting, and with weeping, and with mourning: 13and rend your heart, and not your garments, and turn unto Jehovah your God; for he is gracious and merciful, slow to anger, and abundant in lovingkindness, and repenteth him of the evil. 14Who knoweth whether he will not turn and repent, and leave a blessing behind him, even a meal-offering and a drink-offering unto Jehovah your God?

15Blow the trumpet in Zion, sanctify a fast, call a solemn assembly; 16gather the people, sanctify the assembly, assemble the old men, gather the children, and those that suck the breasts; let the bridegroom go forth from his chamber, and the bride out of her closet. 17Let the priests, the ministers of Jehovah, weep between the porch and the altar, and let them say, Spare thy people, O Jehovah, and give not thy heritage to reproach, that the nations should rule over them: wherefore should they say among the peoples, Where is their God?