Mahabharata 3.291.24

3.291.24

tataḥ sā vihvalevāsītkanyā sūryasya tejasā |
papātātha ca sā devī śayane mūḍhacetanā || 24 ||

Vaisampayana continued, "Hearing these words of hers Surya said, 'So be it!' And that ranger of the skies, that enemy of Swarbhanu, with soul absorbed in Yoga, entered into Kunti, and touched her on the navel. At this, that damsel, on account of Surya's energy, became stupefied. And that reverend lady then fell down on her bed, deprived of her senses. Surya then addressed her, saying, 'I will now depart, O thou of graceful hips! Thou shalt bring forth a son who will become the foremost of all wielders of weapons. At the same time thou shalt remain a virgin.'"