PPPR1cor
It is reported commonly that there is fornication among you ... that one should have his father's wife. 5:1
Trivia: What does a man do who prays or prophesies with his head covered?
Paul says that the other apostles traveled with their wives - including Peter. We know from Mark 1:30 that Peter had a wife, since Jesus cured his mother-in-law. Paul confirms Peter's marital status here.