Source: SK-Bra (Bratislava) Antiphonary of Bratislava I EC Lad.3Folio: 072rSequence: 4Full text: Ego pro te rogavi Petre ut non deficiat fides tua et tu aliquando conversus confirma fratres tuosFeast: Petri, PauliOffice: LGenre: APosition: 4Cantus ID: 002583
