Usually starting with "Al-Hamdu Lillaah" . Salawat: Sending blessings upon Prophet Muhammad (ﷺ).
For a Khutbah to be valid according to most schools of thought, even a short PDF version must include these "Arkan" (pillars): Starting with Alhamdulillah . Salawat: Sending blessings upon the Prophet (PBUH). short jummah khutbah arabic pdf