 A legend relates to both these panels . Once , Parvati was annoyed with Shiva . At this moment , Ravana , who was passing by Mount Kailash , found it as an obstruction to his movement . Upset , Ravana shook it vigorously and as a result , Parvati got scared and <unk> Shiva . Enraged by Ravana 's arrogance , Shiva stamped down on Ravana , who sang praises of Shiva to free him of his misery and turned into an ardent devotee of Shiva . Another version states that Shiva was pleased with Ravana for restoring Parvati 's <unk> and blessed him . 
