Which preposition to use with unwashed

as Occurrences 1%

As every one knows, his boast was to be called 'The Man of the People,' though perhaps he cared as little for the great unwashed as for the wealth and happiness of the waiters at his clubs.'

at Occurrences 1%

So it was a saying among our forefathers "Do, not throw your dirty leaf plates near the front or back door and do not let your brass plates and dishes remain unwashed at night; for if Thakur Baba come along and see them so, he will not come into the house but will be angry and curse us."

for Occurrences 1%

"I frequently leave dishes unwashed for quite a spell at a time.

of Occurrences 1%

A wan little head, but the eyes unwashed of their blue and the irises grown large.

Which preposition to use with  unwashed