'Clothed in White' in the Bible

And round about the throne were four and twenty Elders seated, who were clothed in white raiment, with golden crowns upon their heads.

After this I looked, and behold a great multitude, whom no man could number, out of every nation and tribe and people and tongue, standing before the throne and before the Lamb, clothed in white robes, with palm branches in their hands;

and there came out of the sanctuary the seven angels with the seven plagues. They were clothed in white linen, pure and bright, and girt about the breasts with golden girdles.