Joel 2:30-32

30I will do strange things in the sky and on the earth. I will send blood and fire and clouds of smoke.

31The sun will become dark and the moon will become red. Then the great and frightening day of the Lord will come.

32Everyone who asks the Lord for help will be safe. They will be safe if they believe in his name. The Lord will save the people on Mount Zion and in Jerusalem. He has promised this to those people whom he has asked to come to him.