In anger, Lord Narayana hit the asura on the head with the spoon in his hand. The head was cut off and fell on the ground. But because the asura had consumed amirtham, his head and body continued to live. The head portion of the asura attached itself to a snake body to become Rahu Bhagavan. The body portion that was thrown away fell in Pothigai mountain region. This was found and preserved by a Brahmin. The head of a snake got attached to the asura body to become Kethu.
Benefits of Worshipping:The kethu Bhagavan is ruled by Lord Ganesha and Indra. Those who are affected by Kethu dosha come here for rectification. The person who affected naga dosham, kala sharpa dosham, vivaha dosham(marriage), mental disorders, puthra dosham, fears of robbery, bad habits, nervous and leprosy problems, especially dangerous of all poisonous life forms, they come to visit Kizhaperumpallam Kethu Sthalam(kethu planet) they will rid from all these problems. Kethu is the presiding deity of Moksha.
Things of Worshipping:Day : Tuesday
Donation : Horse Gram, Cat's Eye, spotted Goat, Dear Musk, Mixed Colored Cloth, Feeding Black Dog
Homa/Havan : Wood From Kusha Tree
Medicinal Bath : Red Sandal, Dear Musk, Elephant Musk, Urine of Ram, Pomegranate
Flower : Red Alli
Cloth : Multi Coloured Cloth
Prasatham (Food) : Rice mixed with Khollu powder.