Source: SK-Sk (Spišska Kapitula) Antiphonale ScepusienseFolio: 046rSequence: 17Full text: Ego sum*Feast: Joannis Port. Lat.Office: LGenre: APosition: 2Cantus ID: 002603Notes: Cantus database: Ego sum via veritas et vita nemo venit ad patrem nisi per me alleluia