Revelation 6:9-11

9Then the Lamb opened the fifth seal. I saw an altar where people offered gifts to God. I saw the souls of some of God's people under the altar. These people had died because they had believed God's message. They had continued to speak the true message about Jesus Christ. That is why people had killed them.

10These believers called out loudly, ‘Lord, you have all authority. You are completely good. You always do what is right. When will you decide to judge the people who live on the earth? Do not wait! You should quickly punish the people who killed us!’

11Then each believer received white clothes. God told them to wait for a short time more. They must wait until other believers on earth also died. These believers are also servants of God. God will wait until people kill those believers too. Then the number of them will be complete.