Phanom Rung - Nandin, Shiva's Vehicle

Nandin was the son of Kassavapa and Surabhi. Shiva wanted Surabhi to be his follower but minded her being female. Kassavapa volunteered to mate with the cow who gave birth to the bull named Nandin, presented to be the Shiva’s guardian, together with Mahakala of the eastern entrance to Shiva’s residence on Kailasa Mountain and turned into a bull and acted as his vehicle when Shiva went out

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