Listen to What Once Was Rain - A Setting Of Ahir Bhairav online. What Once Was Rain - A Setting Of Ahir Bhairav is an Instrumental language song and is sung by Ayaan Ali Bangash and Malcolm Dalglish. What Once Was Rain - A Setting Of Ahir Bhairav, from the album Headwaters, was released in the year 2013. The duration of the song is 12:07. Download Instrumental songs online from JioSaavn.