'Robes' in the Bible

and there was given to each one white robes, and it was said to them that they may rest themselves yet a little time, till may be fulfilled also their fellow-servants and their brethren, who are about to be killed -- even as they.

After these things I saw, and lo, a great multitude, which to number no one was able, out of all nations, and tribes, and peoples, and tongues, standing before the throne, and before the Lamb, arrayed in white robes, and palms in their hands,

And answer did one of the elders, saying to me, 'These, who have been arrayed with the white robes -- who are they, and whence came they?'

and I have said to him, 'Sir, thou hast known;' and he said to me, 'These are those who are coming out of the great tribulation, and they did wash their robes, and they made their robes white in the blood of the Lamb;