samvatsarante hi bhavan

 eka-ratram mayesvarah

ramsyaty apatyani ca te

 bhavisyanty aparani bhoh

 

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 

 

O my dear King, you will be able to enjoy with me as my husband at the end of every year, for one night only. In this way you will have other children, one after another.

 

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 

 

Although Urvasi had adversely explained the nature of woman, Maharaja Pururava was very much attached to her, and therefore she wanted to give the King some concession by agreeing to be his wife for one night at the end of each year.