'Washed' in the Bible

and from Jesus Christ, the faithful witness, the firstborn of the dead, and the ruler of the kings of the earth. To him who loves us, and washed us from our sins by his blood;

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.