SB 9.21.36
tad drstva krpayagrhnac
chantanur mrgayam caran
krpah kumarah kanya ca
drona-patny abhavat krpi
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
While Maharaja Santanu was on a hunting excursion, he saw the male and female children lying in the forest, and out of compassion he took them home. Consequently, the male child was known as Krpa, and the female child was named Krpi. Krpi later became the wife of Dronacarya.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Thus end the Bhaktivedanta purports of the Ninth Canto, Twenty-first Chapter, of the Srimad-Bhagavatam, entitled “The Dynasty of Bharata.”