'Lamb's' in the Bible

I told him, "My lord, you know." He said to me, "These are those who came out of the great tribulation. They washed their robes, and made them white in the Lamb's blood.

They overcame him because of the Lamb's blood, and because of the word of their testimony. They didn't love their life, even to death.

One of the seven angels who had the seven bowls, who were loaded with the seven last plagues came, and he spoke with me, saying, "Come here. I will show you the wife, the Lamb's bride."

There will in no way enter into it anything profane, or one who causes an abomination or a lie, but only those who are written in the Lamb's book of life.