The Vishnu Purana (Viṣṇu Purāṇa) is a religious Hindu text and one of the (most important) eighteen Mahapuranas. It is also known as Puranaratna ("gem of Puranas"). Presented as a dialogue between Parashara and his disciple Maitreya, the major topics discussed include creation, stories of battles fought between asuras and devas, the Avat...
Kamsa had married two of Jarasandh’s daughters. These daughters were known as Asti and Prapti. On hearing that Krishna had killed his son-in-law, Jarasandha raised a huge army and attacked the Yadavas. The city of Mathura was under seize by the king of Magadha.
Krishna and Balarama had only a few soldiers, as compared to Jarasandha’s gigantic army. But still they came out to fight. From the sky a bow called Sharnga, two quivers that never ran out of arrows, and a mace named Koumodaki fell into Krishna’s hands. For Balarama the weapons were a plough and a club named Sounanda. Jarasandha was defeated by the two brothers and he fled.
After a few days Jarasandha attacked once more and was defeated yet again. This continued. There were eighteen occasions on which Jarasandha attacked and was defeated by the Yadavas.