World English Bible
Joel 2:31
“The sun will be turned into darkness, and the moon into blood, before the great and terrible day of Yahweh comes.”
Verse in context — Joel 2
29
And also on the servants and on the handmaids in those days, I will pour out my Spirit.
30
I will show wonders in the heavens and in the earth: blood, fire, and pillars of smoke.
31
The sun will be turned into darkness, and the moon into blood, before the great and terrible day of Yahweh comes.
32
It will happen that whoever will call on the name of Yahweh shall be saved; for in Mount Zion and in Jerusalem there will be those who escape, as Yahweh has said, and among the remnant, those whom Yahweh calls.