Jambavantha had killed a lion who had acquired a gem called Syamantaka from Prasena after killing him. Krishna was suspected of killing Prasena for the jewel, so he tracked Prasena's steps until he learned that he had been killed by a lion who had been killed by a bear. Krishna tracked Jambavantha to his cave and a fight ensued. After twenty-one days, realizing who Krishna was, Jambavantha submitted. He gave Krishna the gem and also presented him his daughter Jambavati , who became one of Krishna's wives.
There is a temple dedicated to Jambavantha at Avani (95 kms. from Bangalore), Karnataka.