Listen to A German Requiem, Op. 45: I. Blessed Are They That Mourn online. A German Requiem, Op. 45: I. Blessed Are They That Mourn is an English language song and is sung by The Mormon Tabernacle Choir, Alexander Schreiner and Frank W. Asper. A German Requiem, Op. 45: I. Blessed Are They That Mourn, from the album The Mormon Tabernacle Choir Super Hits -- The Lord's Prayer, was released in the year 2000. The duration of the song is 8:30. Download English songs online from JioSaavn.