Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 40
Sanskrit:
अन्तर्वत्नीमुपालक्ष्य देवीं स प्रययौ पुरीम् ।पुनस्तत्र गतोऽब्दान्ते उर्वशीं वीरमातरम् ॥ ४० ॥
ITRANS:
antarvatnīm upālakṣyadevīṁ sa prayayau purīmpunas tatra gato ’bdānteurvaśīṁ vīra-mātaram
Translation:
Understanding that Urvaśī was pregnant, Purūravā returned to his palace. At the end of the year, there at Kurukṣetra, he again obtained the association of Urvaśī, who was then the mother of a heroic son.