Revelation 19:8

She makes coverings for herself; Her clothing is fine linen and purple.

“And it will be that when they enter at the gates of the inner court, they shall be clothed with linen garments; and wool shall not be on them while they are ministering in the gates of the inner court and in the house.

‘But you have a few names in Sardis who have not defiled their garments, and they will walk with Me in white, for they are worthy.

“Who will not fear, O Lord, and glorify Your name? For You alone are holy; For all the nations will come and worship before You, For Your righteous acts have been revealed.”

And the armies which are in heaven, clothed in fine linen, white and clean, were following Him on white horses.