 He said " I shall assume the form of a serpent and stay here (in Mannarasala) permanently, as long as the sun and the moon are there, showering prosperity on your family and granting protection to all the devotees who come here …".Thus Mandarasala, the place filled with Mandara trees, the holy spot where the serpents got shelter, where the earth was fully cooled, became Mandarasala.The boon came true.