Joel 2:10-12

The earth quakes before them, The heavens tremble; The sun and moon grow dark, And the stars diminish their brightness. The Lord gives voice before His army, For His camp is very great; For strong is the One who executes His word. For the day of the Lord is great and very terrible; Who can endure it? “Now, therefore,” says the Lord, “Turn to Me with all your heart, With fasting, with weeping, and with mourning.” — NKJV