Source: PL-WRu I F 416 Cistercian Gradual (Silesia)Folio: 068vSequence: 1Feast: Fer. 5 in Cena Dom.Office: MASSGenre: TrVPosition: 01Cantus ID: g02429aMode: 2TFull text: In medio duorum animalium innotesceris dum appropinquaverint cognosceris dum advenerit tempus ostenderis