Source: SK-Bra (Bratislava) Antiphonary of Bratislava I EC Lad.3Folio: 071vSequence: 1Full text: Ego pro te rogavi Petre ut non deficiat fides tua et tu aliquando conversus confirma fratres tuosFeast: Petri, PauliOffice: MGenre: RPosition: 3.2Cantus ID: 006630