Revelation 3:4-5

4But you have a few people among you in Sardis who have not done these bad things. They are like people who have kept their clothes clean. They will walk with me and they will wear white clothes. They are good people and it is right for them to wear these white clothes.

5Everyone who wins against Satan will wear white clothes like they do. I will never remove their names from God's book of life. I will say clearly to my Father and his angels that those people belong to me.