Joel 2:28-32

And it will happen afterward thus: I will pour out my Spirit on all flesh, and your sons and your daughters will prophesy, and your elders will dream dreams; your young men shall see visions. And also on the male slaves and on the female slaves, I will pour out my Spirit in those days. And I will set wonders in the heavens, and on earth, blood and fire and columns of smoke. The sun will be changed to darkness, and the moon to blood, before the coming of the great and awesome day of Yahweh. And it will happen—everyone who calls on the name of Yahweh will be rescued, because on Mount Zion and in Jerusalem there will be those who escape, as Yahweh said, and among the survivors whom Yahweh is calling.