confederate with

confederate with someone or something

to organize, join, or unite with someone or a group. A number of states confederated with one another and formed a loose association. I confederated with the neighbors and we filed a joint complaint.
References in classic literature ?
Mr Pickering did not put it so to himself, for he was rarely slangy even in thought, but what he felt was that he had caught The Man and his confederate with the goods.
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