In the Mahabharata, 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 eighteen 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.