Sentence examples for for in from inspiring English sources

"for in" is not a correct or complete part of a sentence in written English.
It may be used as a preposition phrase, but it would need to be followed by a noun or pronoun in order to be syntactically correct. For example: "For in times of trouble, true friends always come through." In this sentence, "for in" is followed by the prepositional phrase "times of trouble" and the subject "true friends." Overall, it is not a common phrase and should be used carefully and sparingly in formal writing.