Rāvana, the lord of the Rākşasas is also highly advanced in asceticism by virtue whereof he has not been ruined albeit he has touched Sītā's person.
सर्वथातिप्रकृष्टोऽसौ रावणो राक्षसेश्वरः। यस्य तां स्पृशतो गात्रं तपसा न विनाशितम्॥