Rest a Little Longer

When he opened the fifth seal, I saw under the altar the souls of those who had been slaughtered because of the word of God and the testimony they had given.They cried out with a loud voice: “Lord, the one who is holy and true, how long until you judge those who live on the earth and avenge our blood?” So they were each given a white robe, and they were told to rest a little while longer until the number would be completed of their fellow servants and their brothers and sisters, who were going to be killed just as they had been.

Revelation 6:9-11 CSB

See this article from Anglican Ink.