SB 9.18.31
vilokyausanasim rajañ
charmistha suprajam kvacit
tam eva vavre rahasi
sakhyah patim rtau sati
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O King Pariksit, upon seeing Devayani with a nice son, Sarmistha once approached King Yayati at the appropriate time for conception. In a secluded place, she requested the King, the husband of her friend Devayani, to enable her to have a son also.