Mbh 9.38.2a

Vaishampayana said, "O king, the seven Sarasvatis cover this universe! Whithersoever the Sarasvati was summoned by persons of great energy, thither she made her appearance. These are the seven forms of the Sarasvati: Suprava, Kanchanakshi, Visala, Manorama, Oghavati, Surenu, and Vimalodaka. The Supreme Grandsire had at one time performed a great sacrifice. While that sacrifice was in course of performance on the ground selected, many regenerate ones crowned with ascetic success came there. The spot resounded with the recitation of sacred hymns and the chanting of the Vedas. In the matter of those sacrificial rites, the very gods lost their coolness (so grand were the preparations). There, O monarch, while the Grandsire was installed in the sacrifice and was performing the grand ceremony capable of bestowing prosperity and every wish, many notable ones conversant with righteousness and profit were present. As soon as they thought of the articles of which they stood in need, these, O monarch, immediately appeared before the regenerate ones (among the guests) that came there. The Gandharvas sang and the diverse tribes of Apsaras danced. And they played upon many celestial instruments all the time. The wealth of provisions procured in that sacrifice satisfied the very gods. What shall I say then of human beings? The very celestials became filled with wonder! During the continuance of that sacrifice at Pushkara and in the presence of the Grandsire, the Rishis, O king, said, 'This sacrifice cannot be said to possess high attributes, since that foremost of rivers, Sarasvati, is not to be seen here!' Hearing these words, the divine Brahman cheerfully thought of Sarasvati. Summoned at Pushkara by the Grandsire engaged in the performance of a sacrifice, Sarasvati, O king, appeared there, under the name of Suprava. Beholding Sarasvati quickly pay that regard to the Grandsire, the Munis esteemed that sacrifice highly.