Source: PL-WRu I F 416 Cistercian Gradual (Silesia)Folio: 160vSequence: 1Feast: Assumptio MariaeOffice: MASSGenre: OffCantus ID: g01421Mode: 1TFull text: Felix namque es sacra virgo Maria et omni laude dignissima quia ex te ortus est sol justitiae Christus deus noster alleluja