The Interpretation of Dreams by Sigmund Freud Chapter 7 Page 25

There is only one thing left for me to do. As I have asserted that the neurotic anxiety originates from sexual sources, I can subject anxiety dreams to analysis in order to demonstrate the sexual material in their dream thoughts.

For good reasons I refrain from citing here any of the numerous examples placed at my disposal by neurotic patients, but prefer to give anxiety dreams from young persons.

Personally, I have had no real anxiety dream for decades, but I recall one from my seventh or eighth year which I subjected to interpretation about thirty years later. The dream was very vivid, and showed me my beloved mother, with peculiarly calm sleeping countenance, carried into the room and laid on the bed by two (or three) persons with birds' beaks. I awoke crying and screaming, and disturbed my parents.