When Dhanvantri appeared with a pot of ambrosia in his hands, a demon named Vrishparva snatched it from him. All the demons then fled to Patal loka with the pot of ambrosia. Lord Vishnu disguised himself as an enchanting beauty and went to Patal loka. There, he found all the demons quarrelling among themselves. Each of them wanted to have his own share of ambrosia. The demons were stunned by Mohini’s beauty the moment they saw Lord Vishnu in the form of a beautiful lady. Mohini took control of the ambrosia pot and summoned the deities to Patal loka.
All the deities and demons were made to sit in separate rows. Mohini then started distributing ambrosia to the deities. A demon named Rahu, who had disguised himself as a deity was also sitting among the deities. Hardly had Rahu gulped down some ambrosia then Mohini severed his head on the information given by chandrama (Moon). The severed head of Rahu tried to take revenge by swallowing chandrama, who took the refuge of Lord Shiva. Shiva kept chandrama
within the lock of his hair. Meanwhile, Rahu too came chasing chandrama and Lord Shiva wore his head as a garland in his neck.