Ravana then promised his mother that he would go to Mount Kailash, the abode of Lord Shiva, and bring the main Atmalinga itself for her worship. Ravana then performed severe penance at Mount Kailash to please Lord Shiva and also sang, in his melodious voice, praises of Shiva (Shiva Tandava Stotram). He even chopped his own head, and made a harp with threads drawn from his skin and intestine.Lord Shiva was please he appeared before him and asked him what he wanted. By this time Narada had asked Lord Vishnu to change Ravana's mind. As a result of this plot, Ravana asks for Goddess Parvati, and Lord Shiva offers fake Parvati to him. On his way back to Lanka Narada tells Ravana that Lord had not given him the real Parvathi and that the real Parvathi was in Pathala. So Ravana frees his companion, goes to Pathala and marries a king's daughter,mandodri.