(An overview from Genesis to Revelation by selected passages.)
The word of the LORD that came to Joel, the son of Pethuel:
Put on sackcloth and lament, O priests;
wail, O ministers of the altar.
Go in, pass the night in sackcloth,
O ministers of my God!
Because grain offering and drink offering
are withheld from the house of your God.
Consecrate a fast;
call a solemn assembly.
Gather the elders
and all the inhabitants of the land
to the house of the LORD your God,
and cry out to the LORD.
Alas for the day!
For the day of the LORD is near,
and as destruction from the Almighty it comes.
Joel 1:1,13-15 (ESV)