Revelation 6:10-12

New Revised Standard Version, Anglicised Catholic Edition

¹⁰ they cried out with a loud voice, ‘Sovereign Lord, holy and true, how long will it be before you judge and avenge our blood on the inhabitants of the earth?’ ¹¹ They were each given a white robe and told to rest a little longer, until the number would be complete both of their fellow-servants^[a] and of their brothers and sisters,^[b] who were soon to be killed as they themselves had been killed.

¹² When he opened the sixth seal, I looked, and there came a great earthquake; the sun became black as sackcloth, the full moon became like blood,