'Clean' in the Bible

and the seven angels who had the seven plagues came out from the temple, dressed [in] clean, bright linen garments, and girded with golden belts around their chests.

And it has been granted to her that she be dressed in bright, clean fine linen (for the fine linen is the righteous deeds of the saints).

And the armies [that are] in heaven, dressed in clean, white fine linen, were following him on white horses.