Listen to Omar Khayyam: Part I: Waste not your hour, nor in the vain pursuit - (Chorus) online. Omar Khayyam: Part I: Waste not your hour, nor in the vain pursuit - (Chorus) is an English language song and is sung by Catherine Wyn-Rogers. Omar Khayyam: Part I: Waste not your hour, nor in the vain pursuit - (Chorus), from the album Bantock: Omar Khayyam, was released in the year 2007. The duration of the song is 4:09. Download English songs online from JioSaavn.