The book Mausala Parva describes the events start near the city of Dwarka 35 years after the end of Kurukshetra war. The empire is peaceful and prosperous, the youth of Yadavas have become frivolous and hedonistic. Samba dresses up as a woman and his friends meet Rishi Vishwamitra, Durvasa, Vashista, Narada and other rishis, who were visiting Dwaraka for an audience with Krishna. The young man playfully pretending to be a woman claims he is pregnant, and asks the rishis to predict the gender of the baby. One Rishi sees through the prank. In a fit of rage, he curses Samba will give birth to an iron bolt (Gada (mace) a weapon) that will destroy his entire race. As per the curse, Samba next day delivered an iron rod. The youth inform King Ugrasena what has happened, who asks Samba to powder the iron bolt and cast it into the Prabhas sea. Later this powder grew up on sea shore in the form of eraká grass. After some time a fight with iron clubs made of eraká grass, broke out between the Yadavas, at a festival, who killed each other, thus ending up the whole of the clan. A piece to the same iron bolt dropped down in the sea and swallowed by a fish which was caught by a hunter named Jara. He took out the iron piece and applied it on the tip of his arrow. The hunter Jara, mistook Krishna’s partly visible left foot for that of a deer, and shot an arrow, wounding him mortally resulting departure of Krishna from the earth.
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Story how Samba (Krishna’s son) played prank and was cursed by a Rishi causing destruction of his entire race
The marriage of Satyabhama and Jambavati to Krishna is closely linked to the story of Syamantaka, the precious diamond given by the Sun-god Surya to his devotee Satyajit, father of Satyabhama. Krishna requests Satyajit to present the gem to the Yadava elder Ugrasena, which the latter refuses and instead presents it to his brother Prasena. Prasena wears it on a hunting expedition, where he is killed by a lion, who is in turn killed by Jambavan, the bear-king. When accused by Satyajit of stealing the jewel, Krishna goes in its search and finally following trials of the corpses of Prasena and the lion, confronts Jambavan. After 27/28 day duel, Jambavan – the devotee of Rama surrenders to Krishna, who he realizes is none other than Vishnu. He returns the gem and gives Jambavati to Krishna. When the presumed dead Krishna returns to Dwarka, a humiliated Satyajit begs his forgiveness and offers Satyabhama’s hand in marriage along with the jewel.