SB 6.5.33
sadhricinam praticinam
parasyanupatham gatah
nadyapi te nivartante
pascima yaminir iva
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The Savalasvas took to the correct path, which is obtainable by a mode of life meant to achieve devotional service, or the mercy of the Supreme Personality of Godhead. Like nights that have gone to the west, they have not returned even until now.