The Great Epic of the Bhārata dynasty 3.97.26

3.97.26

agastyasyāśramaḥ khyātaḥ sarvartukusumānvitaḥ |
prāhrādirevaṃ vātāpiragastyena vināśitaḥ || 26 ||

"And it was thus, O Bharata, that Agastya begat an excellent son in consequence of which his ancestors, O king, obtained the regions they desired. And it is from that time that this spot hath become known on the earth as the asylum of Agastya. Indeed, O king, this is the asylum graced with numerous beauties, of that Agastya who had slain Vatapi of Prahrada's race. The sacred Bhagirathi, adored by gods and Gandharvas gently runneth by, like a breeze-shaken pennon in the welkin. Yonder also she floweth over craggy crests descending lower and lower, and looketh like an affrighted she-snake lying along the hilly slopes. Issuing out of the matted locks of Mahadeva, she passeth along, flooding the southern country and benefiting it like a mother, and ultimately mingleth with the ocean as if she were his favourite bride. Bathe ye as ye like in this sacred river, ye son of Pandu! And behold there, O Yudhisthira, the tirtha of Bhrigu that is celebrated over the three worlds and adored, O king, by great Rishis. Bathing here, Rama (of Bhrigu's race) regained his might, which had been taken away from him (by Dasaratha's son). Bathing here, O son of Pandu, with thy brothers and Krishna, thou wilt certainly regain that energy of thine that hath been taken away by Duryodhana, even as Rama regained his that had been taken away by Dasaratha's son in hostile encounter."