Joel 2:28-32

And it shall come to pass after this, that I will pour out my spirit upon all flesh: and your sons and your daughters shall prophesy: your old men shall dream dreams, and your young men shall see visions. Moreover upon my servants and handmaids in those days I will pour forth my spirit. And I will shew wonders in heaven; and in earth, blood, and fire, and vapour of smoke. The sun shall be turned into darkness, and the moon into blood: before the great and dreadful day of the Lord doth come. And it shall come to pass, that every one that shall call upon the name of the Lord shall be saved: for in mount Sion, and in Jerusalem shall be salvation, as the Lord hath said, and in the residue whom the Lord shall call.