Which preposition to use with embitterment

of Occurrences 3%

As long as we foster these things in our private life, so long will they lead in our public life to the embitterment of nation against nation.

to Occurrences 1%

Of a necessity it must cause deep pain and embitterment to our Catholic population when again and again ENTIRELY UNTRUE ACCUSATIONS are made against the priesthood of their Church.

Which preposition to use with  embitterment