What do the "white robes" in Revelation signify? Who received them?

And do they spiritually tie in with the filthy garments Joshua is portrayed wearing in Zechariah 3? http://bible.cc/revelation/6-11.htm And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their... show more And do they spiritually tie in with the filthy garments Joshua is portrayed wearing in Zechariah 3?

http://bible.cc/revelation/6-11.htm

And white robes were given unto every one of them; and it was said unto them, that they should rest yet for a little season, until their fellowservants also and their brethren, that should be killed as they were, should be fulfilled. - Revelation 6:11.
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