For then there will be a great tribulation, such as has not occurred since the beginning of the world until now, nor ever will again.

Behold, I will throw her on a bed of sickness, and those who commit adultery with her into great tribulation, unless they repent of her deeds.

A Multitude from the Tribulation

After these things I looked, and behold, a great multitude which no one could count, from every nation and all the tribes, peoples, and languages, standing before the throne and before the Lamb, clothed in white robes, and palm branches were in their hands;

I said to him, “My lord, you know.” And he said to me, “These are the ones who come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb.