I assume you're referring to the opening scene in Oedipus Rex, where we hear the despair of the the Chorus. They have gathered outside of Oedipus's palace to beg their king to once again save Thebes--just as he saved them from the Sphinx so many years ago. They recount the evidence of a curse which plagues Thebes: women give birth to stillborn babies, crops are withering in the field, animals are dying. All signs of life appear to be dying, and they are afraid. The Chorus asks Oedipus to save them once again, and he assures them he has already sent Creon, his brother-in-law--to the oracle at Delphi for the cause of and the cure for this problem.