Listen to Slumber online. Slumber is an English language song and is sung by Spa, Meditation, Massage Therapy and Nature Sounds Relaxation: Music for Sleep. Slumber, from the album Calming Night Sounds – Relaxing Music to Sleep, Easy Listening, Healing Therapy, Soft Sounds, was released in the year 2017. The duration of the song is 4:02. Download English songs online from JioSaavn.