'Blood of the Lamb' in the Bible

And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.

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.

And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.