Srimad Bhagavatam Canto 09, Chapter 01, Text 36

SB 9.1.36

evam stritvam anupraptah
 sudyumno manavo nrpah
sasmara sa kulacaryam
 vasistham iti susruma
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
I heard from reliable sources that King Sudyumna, the son of Manu, having thus achieved femininity, remembered his familial spiritual master, Vasistha.
Srimad Bhagavatam Canto 09, Chapter 01, Text 35
Srimad Bhagavatam Canto 09, Chapter 01, Text 37