The Great Epic of the Bhārata dynasty 16.2.8

16.2.8

vṛṣṇyandhakavināśāya musalaṃ ghoramāyasam |
vāsudevasya dāyādaḥ sāmbo'yaṃ janayiṣyati || 8 ||

"Hear now, O king, what those ascetics, attempted to be thus deceived, said: ‘This heir of Vasudeva, by name Samva, will bring forth a fierce iron bolt for the destruction of the Vrishnis and the Andhakas. Ye wicked and cruel ones, intoxicated with pride, through that iron bolt ye will become the exterminators of your race with the exception of Rama and Janarddana. The blessed hero armed with the plough will enter the ocean, casting off his body, while a hunter of the name of Jara will pierce the high-souled Krishna while lying on the ground.’