Fasting: Observed on Occasions of Judgments of God
Source: TTT
Joel 1:14
Consecrate a fast; proclaim a solemn assembly! Gather the elders and all the residents of the land to the house of the LORD your God, and cry out to the LORD.
Joel 2:12
“Yet even now,” declares the LORD, “return to Me with all your heart, with fasting, weeping, and mourning.”