Zechariah 3:5

“When the priests enter, then they shall not go out into the outer court from the sanctuary without laying there their garments in which they minister, for they are holy. They shall put on other garments; then they shall come near to that which is for the people.”

Then he said, “These are the two anointed ones who are standing by the Lord of all the earth.”

And 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 washed their robes and made them white in the blood of the Lamb.