NET

8 She was permitted to be dressed in bright, clean, fine linen” (for the fine linen is the righteous deeds of the saints).

Darby

8 And it was given to her that she should be clothed in fine linen, bright [and] pure; for the fine linen is the righteousnesses^D9626 of the saints.

Darby Bible Notes

righteousnesses - Dikaioma. see Rom. 1.32. In Hebrew the plural of acts expressing a quality is used for the abstract quality itself. This may be the case, by analogy, here. See Ps. 11.7, where, in Hebrew, it is 'righteousnesses,' but it is actual, not imputed, righteousness.

KJV

8 And to her was granted that she should be arrayed in fine linen, clean and white: for the fine linen is the righteousness of saints.