'Clothed in White' in the Bible

He who overcomes, this man will be clothed in white garments, and I will, no, not erase his name out of the book of life. And I will acknowledge his name before my Father, and before his agents.

And around the throne were twenty-four thrones, and upon the thrones were sitting twenty-four elders clothed in white garments, and golden crowns upon their heads.

After these things, I looked and lo, a great multitude, which none could number, out of every nation, and tribes and peoples and tongues, standing before the throne and before the Lamb, clothed in white robes, and palms in their ha

And one of the elders answered, saying to me, Who are these who are clothed in white robes, and where did they come from?