Joel 2:12-17

12Therefore also now, saith the LORD, turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning: 13And rend your heart, and not your garments, and turn to the LORD your God: for he is gracious and merciful, slow to anger, and of great kindness, and repenteth of the evil. 14Who knoweth if he will return and repent, and leave a blessing behind him; even a meat offering and a drink offering to the LORD your God? 15Blow the trumpet in Zion, sanctify a fast, call a solemn assembly: 16Gather the people, sanctify the congregation, assemble the elders, gather the children, and those that nurse at the breasts: let the bridegroom go forth from his chamber, and the bride out of her room. 17Let the priests, the ministers of the LORD, weep between the porch and the altar, and let them say, Spare thy people, O LORD, and give not thy heritage to reproach, that the heathen should rule over them: why should they say among the people, Where is their God?1