Which preposition to use with befouled

with Occurrences 6%

Then Beltane let fall his reeking sword and staggering out into the light, saw his bright mail befouled with clotted blood, and of a sudden the world went black about him and he fell and lay with his face among the trampled grass.

amid Occurrences 1%

In an access of fury, the Austrian arms were torn down, dashed to pieces, and befouled amid the applause of the crowd in spite of the dissuasion of the public functionaries and of prudent persons.

Which preposition to use with  befouled