Bible Verses About Prisons: Sometimes allowed to be visited by their friends

Now when John had heard in prison the works of Christ: sending two of his disciples he said to him:

Naked, and you covered me: sick, and you visited me: I was in prison, and you came to me.

And he commanded a centurion to keep him: and that he should be easy and that he should not prohibit any of his friends to minister unto him.