Alleluia, Song of Sweetness TANTUM ERGO—Essay on the Church Plain Chant, 1782 Alleluia, Song of Sweetness 1 Alleluia, song of sweetness, Voice of joy that cannot die; Alleluia is the anthem Ever dear to choirs on high, In the house of God abiding Thus they sing eternally. 2 Alleluia thou resoundest, True Jerusalem and free; Alleluia, joyful Mother, All thy children sing with thee, But by Babylon’s sad waters Mourning exiles now are we. 3 Alleluia cannot always Be our song while here below;