According to the Ayyavazhi sect of hinduism, Thretha Yukam was the fifth of the Eight Yukams. In this aeon Isvaran created the fourth piece of the primordial Kroni as a Ten-headed mighty warrior, as per the request of Mayon, naming him as Ravanan, with ten heads as ten mountains.
He oppressed all those living on earth by extracting Uliyam from them. He subdued all the earthly kings and made them pay tributes to him. Suffering under his oppression, Thevarkal sought the help of Mayon, who for the purpose of destroying him, took birth as Raman.
In his death-bed Ravanan was called to repent, which he neglected by saying: "Only with the help of my brother were you able to destroy me". With this episode of killing Ravanan, Thretha yukam came to an end.
See also
| | Topics in Ayyavazhi |
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| Akilattirattu Ammanai (Primary Scripture) |
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Akilam one | Akilam two | Akilam three | Akilam four | Akilam five | Akilam six | Akilam seven | Akilam eight | Akilam nine | Akilam ten | Akilam eleven | Akilam twelve
| Akilam thirteen | Akilam fourteen | Akilam fifteen | Akilam sixteen | Akilam seventeen |
| Arul Nool (Secondary scripture) |
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| Ukappatippu | Ucchippadippu | Vazhappadippu | Saattu Neettolai | Pothippu | Sivakanta Athikarappatthiram | Patthiram | Saptha Kannimar Padal | Thingal patham | Panchadevar Urppatthi | Nadutheervai Ula | Kalyana Vazhthu |
| Philosophical Concepts |
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| Avatar | Ekam | Sivam | Sakthi | Thirukkalyana Ekanai | Tatvas | Kroni | Kalimayai | Kaliyan | Reincarnation | Dharma | Kosas |
| Holy Places |
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| Swamithoppepathi | Ambalappathi | Muttappathi | Tamaraikulampathi | Pooppathi | Vakaippathi | Avatharappathi |
| Worship Centers: |
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| Pathis | Nizhal Thangals |
| God |
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| Ekam | Ayya Vaikundar | Sivan | Vethan | Thirumal | The Trinity |
| Yugas |
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| Neetiya Yuga | Chathura Yukam | Netu Yukam | Kretha Yukam | Thretha Yukam | Dwapara Yukam | Kaliyukam | Dharma Yukam |
| Religiosity |
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| Theology | Religious Practices | Main teachings |
| Festival and Celebrations |
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| Ayya vaikunda Avataram | Thiru Eadu Vasippu | Kodiyettru Thirunal | Panguni Theertham | Aruvadai Pichai |
| Movements |
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| Ayya Vaikundar Thirukkudumbam | Vaikundar Anbar Sangam | Ayyavazhi Makkal Iyakkam | Vaikundar Seva Sangam | Akilam Kalai Ilakkiya Peravai | Veeman Citar Arakkattalai |