Source: PL-Wn 12720 V Antyfonarz opata Mścisława z Tyńca, pars de temporeFolio: 0010vSequence: 4Feast: Fer. 4 Hebd. 1 Adv.Office: V2Genre: APosition: MCantus ID: 002119Mode: 2Differentia: D1Full text: De Sion exibit lex et verbum domini de Jerusalem alleluia