'Suffering' in the Bible

"I know your suffering and your poverty though you are rich and the slander committed by those who claim to be Jews but are not. They are the synagogue of Satan.

Don't be afraid of what you are going to suffer. Look! The Devil is going to throw some of you into prison so that you may be tested. For ten days you will undergo suffering. Be faithful until death, and I will give you the victor's crown of life.

Then he told me, "These are the people who are coming out of the terrible suffering. They have washed their robes and made them white in the blood of the lamb. That is why: "They are in front of the throne of God and worship him night and day in his Temple. The one who sits on the throne will shelter them.