Then I looked as the Lamb broke open the sixth seal, and there [I saw] a great earthquake; the sun turned as black as sackcloth made out of [goat] hair, and the entire moon turned [as red] as blood.

And I will give [authority] to my two witnesses and they will prophesy for 1,260 days, wearing sackcloth" [i.e., a black, coarse cloth made of goat's hair].