Audi filia et vide and De sinu patris
Audi filia et vide and De sinu patris are 13th-century papal letters addressed, respectively, to a widowed queen of Cyprus and a married nobleman of the Kingdom of Jerusalem. In the letters, a pope rebukes unnamed recipients for maintaining an extramarital relationship.
Source: Wikipedia — Audi filia et vide and De sinu patris (CC BY-SA 4.0)