These Zadok Levitical priests had a look and life style that set them apart. They were not to shave their heads, but they had to trim their hair. They were not allowed to drink wine when they were in the inner court. They could not marry a widow or a divorced woman. However, there was an exception for the widow of a priest. They could only marry a virgin in good standing from the house of Israel.
Now we have another oracle of Yahweh, the sovereign, Mighty One of Israel, via Isaiah. Yahweh, in the first person singular, was going to pour out his wrath on his enemies and bring revenge on his foes. He also was going to turn his hand against his own people by melting them down with lye so that they would be noting but worthless scum dross. He was going to take away all their alloys. This is an interesting description of God taking the Israelites apart.