Joel 2:30
I will show wonders in the heavens and on the earth,
What it says
God will show wonders in the heavens and on the earth: blood, fire, and columns of smoke.
What it is doing
This verse links the Spirit promise with cosmic signs.
In context
28And afterward, I will pour out My Spirit on all people. 29Even on My menservants and maidservants, 30I will show wonders in the heavens and on the earth, 31The sun will be turned to darkness 32And everyone who calls on the name of the LORD