who was caused by Shiva himself.
Shiva had opened his third eye for punishing Indra but on Brahispati's intervention let the fire emitting from it fall into the ocean. Out of this fire and from ocean's womb rose a male child. As he rose from jala, the water, he was named Jalandara.
Later, when he grew into a gold-like glowing youth, he was married to the daughter of Kalanemi, the founder-father of demon clans. Jalandara was now exceptionally powerful and wished to drive out Indra and his crew from Indraloka.
Indra prayed Brahma for help but he was helpless against his might. Vishnu declined to act against him, as, being ocean born, he considered him his brother-in-law.
Finally, the great sage Narad incited Jalandara to obtain Parvati, the most beautiful woman in all three worlds, and thus put him against Shiva, as he knew that Shiva alone could destroy him.
Arrogant Jalandara challenged Shiva to hand him over his consort and in the process became victim of Shiva's wrath and got killed. Something of the similar kind happened in the case of Ravana, the king of Lanka.
Pleased by his penance Shiva blessed him with the boon of immortality. This bred in Ravana vanity and arrogance. This vain and arrogant Lanka ruler wished to have Mount Kailash, the abode of Shiva, shifted to Lanka. He went to Kailash and to uproot it began shaking it. His act of uprooting it sent tremors across the Mountain. Shiva perceived Ravana's arrogance and was annoyed.
To punish Ravana he pressed the Mountain by the thumb of his foot, but before it crushed Ravana, he prayed for Lord's mercy and the compassionate Lord forgave him. Out of this compassionate nature of Shiva there emerged his Ravananugraha-murti, that is, the form of him who was kind to Ravana.