Revelation 6:10-12

Young's Literal Translation

¹⁰ and they were crying with a great voice, saying, `Till when, O Master, the Holy and the True, dost Thou not judge and take vengeance of our blood from those dwelling upon the land?'

¹¹ and there was given to each one white robes, and it was said to them that they may rest themselves yet a little time, till may be fulfilled also their fellow-servants and their brethren, who are about to be killed -- even as they.

¹² And I saw when he opened the sixth seal, and lo, a great earthquake came, and the sun became black as sackcloth of hair, and the moon became as blood,