SB 9.9.10
bhagirathah sa rajarsir
ninye bhuvana-pavanim
yatra sva-pitrnam deha
bhasmibhutah sma serate
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The great and saintly king Bhagiratha brought the Ganges, which can deliver all the fallen souls, to that place on earth where the bodies of his forefathers lay burnt to ashes.