KJV:
And his raiment became shining, exceeding white as snow; so as no fuller on earth can white them.
NASB:
and His garments became radiant and exceedingly white, as no launderer on earth can whiten them.
KJV:
And I said unto him, Sir, thou knowest. And he said to me, These are they which came out of great tribulation, and have washed their robes, and made them white in the blood of the Lamb.
NASB:
I said to him, "My lord, you know." And he said to me, "These are the ones who come out of the great tribulation, and they have washed their robes and made them white in the blood of the Lamb.