Source: SK-Bra (Bratislava) Antiphonary of Bratislava III EC Lad.6Folio: 076rSequence: 1Full text: Observa igitur et audi vocem meam et inimicus ero inimicis tuisFeast: Dom. 4 QuadragesimaeOffice: MGenre: VPosition: 01Cantus ID: 006143b