Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 12-13
Sanskrit:
सा चाभूत् सुमहत्पुण्या कौशिकी लोकपावनी ।रेणो: सुतां रेणुकां वै जमदग्निरुवाह याम् ॥ १२ ॥तस्यां वै भार्गवऋषे: सुता वसुमदादय: ।यवीयाञ्जज्ञ एतेषां राम इत्यभिविश्रुत: ॥ १३ ॥
ITRANS:
sā cābhūt sumahat-puṇyākauśikī loka-pāvanīreṇoḥ sutāṁ reṇukāṁ vaijamadagnir uvāha yām
Translation:
Satyavatī later became the sacred river Kauśikī to purify the entire world, and her son, Jamadagni, married Reṇukā, the daughter of Reṇu. By the semen of Jamadagni, many sons, headed by Vasumān, were born from the womb of Reṇukā. The youngest of them was named Rāma, or Paraśurāma.