I Claudius - The Emperor Caligula has become a god.

Lentulus: "Your recovery is a miracle."
Caligula: "But you prayed for it, Lentulus."
Lentulus: "Oh, night and day. But our prayers are not always heard."
Caligula to Lentulus: “You offered your life to the gods in the place of mine. That was extremely noble.”
Lentulus: "It's true. I did."
Caligula: "And what are you going to do about it?"
Lentulus: "Do about it? What do you mean?"
Caligula: "Well, I'm still here and so are you, but we oughtn't both to be here. Should we not give the gods the things that we promise them? You're in danger of the crime of perjury, Lentulus. Think about it. But not too long. The gods won't wait forever, of that I can assure you. I know them only too well."
Lentulus waited a long time, until he realized that "the god" Caligula wasn't going to forget, and then finally committed suicide.