Joel 2:11-17 AMP

11 And the Lord utters His voice before His army, for His host is very great, and [they are] strong and powerful who execute [God's] word. For the day of the Lord is great and very terrible, and who can endure it? [Isa. 26:20, 21; 34:1-4, 8; Rev. 6:16, 17.]

12 Therefore also now, says the Lord, turn and keep on coming to Me with all your heart, with fasting, with weeping, and with mourning [until every hindrance is removed and the broken fellowship is restored].

13 Rend your hearts and not your garments and return to the Lord, your God, for He is gracious and merciful, slow to anger, and abounding in loving-kindness; and He revokes His sentence of evil [when His conditions are met].

14 Who knows but what He will turn, revoke your sentence [of evil], and leave a blessing behind Him [giving you the means with which to serve Him], even a cereal or meal offering and a drink offering for the Lord, your God?

15 Blow the trumpet in Zion; set apart a fast [a day of restraint and humility]; call a solemn assembly.

16 Gather the people, sanctify the congregation; assemble the elderly people, gather the children and the nursing infants; let the bridegroom [who is legally exempt from attending] go forth from his chamber and the bride out of her closet. [None is exempt from the humiliation.]

17 Let the priests, the ministers of the Lord, weep between the porch and the altar; and let them say, Have pity and spare Your people, O Lord, and give not Your heritage to reproach, that the [heathen] nations should rule over them or use a byword against them. Why should they say among the peoples, Where is their God?