I'm sorry, but Al Jarreau did not release a version of the song "Hark the Herald Angels Sing." The song is a traditional Christmas carol, often associated with the Christian celebration of Jesus' birth. It was originally written by Charles Wesley and later set to music by Felix Mendelssohn. The lyrics of the song proclaim the glory of the new born King (referring to Jesus), emphasizing themes of peace, mercy, and the reconciliation of God with sinners. The angels are depicted as rejoicing and proclaiming the news of Christ's birth in Bethlehem. The song also highlights the belief in Jesus as the Son of God, the Prince of Peace, and the bringer of light, life, and healing. It expresses the joyous message that through Jesus, humanity can find salvation and eternal life.