Mukunda

“O Rakshasa, It might be possible for a person to live for a long time after forcibly taking away Shachi Devi, a woman of unmatched beauty and wife of the wielder of the thunderbolt [Indra]. But a person who abuses me shall not be released from death even if they were to drink amrita [nectar which grants immortality].” (Sita Devi speaking to Ravana, Valmiki Ramayana, Aranya Kand, 48.24)