Mbh 13.83.1c

Listen to me also, O slayer of Vala, as I tell thee in detail the reason why kine,--the offspring of Surabhi,--have descended on the earth, O best of the deities. In day of yore, O son, when in the Devayuga the high souled Danavas became lords of the three worlds, Aditi underwent the severest austerities and got Vishnu within her womb (as the reward thereof). Verily, O chief of the celestials, she had stood upon one leg for many long years, desirous of having a son.[382] Beholding the great goddess Aditi thus undergoing the severest austerities, the daughter of Daksha, viz., the illustrious Surabhi, herself devoted to righteousness, similarly underwent very severe austerities upon the breast of the delightful mountains of Kailasa that are resorted to by both the deities and the Gandharvas. Established on the highest Yoga she also stood upon one leg for eleven thousand years. The deities with the Rishis and the great Nagas all became scorched with the severity of her penances. Repairing thither with me, all of them began to adore that auspicious goddess. I then addressed that goddess endued with penances and said, "O goddess, O thou of faultless conduct, for what purpose, dost thou undergo such severe austerities. O highly blessed one, I am gratified with thy penances, O beautiful one! Do thou, O goddess, solicit what boon thou desirest. I shall grant thee whatever thou mayst ask." Even these were my words unto her, O Purandara. Thus addressed by me, Surabhi answered me, saying, "I have no need, O Grandsire, of boons. Even this, O sinless one, is a great boon to me that thou hast been gratified with me." Unto the illustrious Surabhi, O chief of the celestials who said so unto me, O lord of Sachi, I answered even in these words, O foremost of the deities, viz., "O goddess, at this exhibition of thy freedom from cupidity and desire and at these penances of thine, O thou of beautiful face, I have been exceedingly gratified.