Joel 2:29-31

International Standard Version

²⁹ Also at that time I will pour out my Spirit
    upon men and women servants.
³⁰ I will display warnings in the heavens,
    and on the earth blood, fire, and columns of smoke.
³¹ The sun will be given over to darkness,
    and the moon to blood,
        before the coming of the great and terrifying Day of the Lord.