What is "harivarasanam"

Harivarasanam, also known as Hariharasuthāshtakam, is a Sanskrit Hindu devotional song composed in the astakam metre, recited at Sabarimala (the principal Ayyappan pilgrimage site), before closing the temple door every night. The song was written by Kambangudi Kulathur Srinivasa Iyer and Swami Vimochanananda sang it for the first time at Sabarimala. Though there have been many versions of this song sung by many renowned vocalists like P. Unni Krishnan, the Sabarimala temple plays the rendition by K. J. Yesudas of a musical version composed by the renowned music director G. Devarajan every evening after the final pooja.